CINXE.COM

<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "search.worldcat.org",cType: 'non-interactive',cRay: '927da0878d1d3fbd',cH: '_VH_f3DHX3gl8i46vyxvJ4dTUVNuX7fujRUDM4e40uc-1743233061-1.2.1.1-Kac2D2cB5D7DlshOL6pgLPG0JuotFl_IpOkxVb6M8amX7atEMtbX4.Z6LVP85oIn',cUPMDTk: "\/issn\/0027-8424?__cf_chl_tk=hpG1Yf3WrHAXVvyhEBJmOvY0QPqQvH4dV8zyZffF3Bk-1743233061-1.0.1.1-zNW04kD977giRKuCU.dZJrPeuJCtLUjsxbYhs9F15dI",cFPWv: 'b',cITimeS: '1743233061',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/issn\/0027-8424?__cf_chl_f_tk=hpG1Yf3WrHAXVvyhEBJmOvY0QPqQvH4dV8zyZffF3Bk-1743233061-1.0.1.1-zNW04kD977giRKuCU.dZJrPeuJCtLUjsxbYhs9F15dI",md: "w_OPhntPns0A88ml1ZqI_sb58yajKbzkoGOlvS5h8j4-1743233061-1.2.1.1-v3D2yvPgdtb6P_pMtxI0XYsUL2LpO7KHdQz5sDLlGULRVZFu_T1M_kdiOkcul.C2OMhv3CsTreCPBBrqz7L.dDzX5uCEB9MNgEAkVVJCpEiG9V1XP5ajDVd43NyV4Ccj4I3LtRrV5qj15LNY5P3920jsIilWj3po5SQ40wYyN9TmjxpV8g4SeV5UcSNGpbe0M9VgpGMwFehEf72PGrlC5gpBp.fsAFE8Ij5G1kcrVVfYCgy0sdbzEsvBhC5uP4r8RMf9nWRoXot7MCjaYHjbkPP__Yzxy5ayMnIUNWSII3VnR2iiH9jed1yJMg3BA4OztGQZzeexLqV_BG_l3_MZhwIjXaeh76BuKi5z1_ScQBGBy0F3PbdlJrGxw7G5ThV_cYLCEGyyqIIk71xzOiCeDLRZyPIKl0EbBh_hBev6dYGn4tCkvbkDT0JBRIgE39.SFPFD4Xqs9WEyGWHyN5k1yENwBcJjjJgdOz5Xo.V7pejrQ9moLbvQO9gXqPnEkPiXY74jzhC3TLbU6tkSQJL3_gOpUNJD1s6dg.u.yr8UqONOAX_AEFHOtnMXNvObdxSab9suqubmx0_E6mInQCmRZd1lz3e6X6mKzgysNP_RzVAX8eDt_vhG_LQGwWlovYhJ29pdmFpx7J8WKceASGJkgVSBwlP63YCMQ8QySbZlH9PK8Q8kAD1lyzgbGq975SWXNA.zyIBZx.TzzR2hyJLPXYRpqRclLNIM7yeUSvnEgKIdZU.dKR9rcUr4c.TAhZnCG9Qp3nZ4GHX2V9XBn1UdEEsix8_XeufOFhCocOLWc9nbLPuUpridSX98xbYBoWfO8wQuybN2HhD1WZ6TByrQdrlzNKMWybYOLMY5S4uxlfBIgnzDIZiqvR75bsjY5QFnFYnbO4oI8zvhyKbzY05j_z_OwG72lEGZ5ybI23yn58yovY7KF4aFS56TeC.RJpet9zh1f7_a7eIdNcuBiDRDgF1XpYE596txxo6D_gmfq5zRl_YGNg44Lgtd7T1BQ.mwZrudsd8R1ue4qw70bGFB2hNSxxkLryCyBcehNp5Gjb0IAYoWI3DT2AunZDGauJoOtr36aUo0JyblRyHLjq8n3ZP2C13vTGv0IHwzSK9zCeCxy5MiAuC2EiRn74OYRSa6I7taocOJJhkMLBzuquct7zrxTghn8juFuje8j8zw4FFLfctvYJGE_gLcHGbfLYuXBJD1Xy1H.bX26m5qX_GGtGCqOWdLnYxqrX7ilop0feM",mdrd: "J8mkHwKicpyzfPJLsblbJZMtAnETF7.5XMQng1j6Q3M-1743233061-1.2.1.1-vvYKSBTk6xxadwxwAYyrTTZmgXyOrzcs1tYtCK886NfU.EfXyO1YFVkOgW99L6kGj9VHHTBEIqINv3eqFsLfbotDJ8rxri.dQI6RbjqhOXTVebgjeV3RxzuFHLZvgvEiEySQXGZeLBTsu6YNTC6IOnwujFs9D33dImvKhY_GOO2MLQzfQc.SZsUiSL1X5UzumV6TJTdApuNdeFuaneAg0nGVGXEPmeUIX8Zl_Nyfi9UcVacAaC3WcSOTlV.t9_Vh9PF7opPW3ssPr2ydpNxzA_Wf3H7v2bNsxiv.tVIXxSdIDiZC9c4Z9CxxF4mdWljsmmMKwrLA_iYc4dOzFPED3weRx9EoR_XW8sczX4GQB3VadQouOdhCjVluAlagE9iz6FwFcnO_WjWH2m0SKppmkVH7ozZxXp2dTwo7WMOiDLmsMso6WUihkcc8UJbrvkU6xydtQcHSJZZX5FdAYx4tKn5oiUBtCrXJonZkHndvcmFhkCo.Up1Q28VHARGxW.tX1CTHNLJOWDsUZOE.QtL0Juh6fYyAt.UqE5XmpcVcVnnAD_ZgRf_zBDn_BrU5uBNcBNwXmWPNU4FmpqS6fxpwOLFCDaqOVFCCIY82QwFlB3.TrGDDnQgJ.KCT.ausd69GxAPSXF.JDlY4roFKGaq_z.N0VUYo3v_U56BstewcGNx7KjrLc3FwhVVay5ST4XYGbqYz95cLeOAg5PxYEQululylu.OJUXXK_1urDbFM3ajUZmS_hoPpa1kdgaCYKB8SlFYVypYy4fEdIVGiJgazBDtBN_oe.6EMeFp74HVMtL3.KwdPH7MzHBCtD5qTfvLxF3yxZXoLVuW7d_R6igQVHJVBkkWVohK9Z_KR6QN6BfKMT.1gOArLAF78.YiWfCazMZFUnYYedFE9ex7zX_RUy0BR_BaGdwCphxBTNBYKQ3JtiZ7VOhGvo1EKjra8eu7sD_kwIuDT3d5INzllKvHt44YHtiZtFcf8GERNSYg1K2NjDiJrkLCeGQU5WlTvOkNOwAGB4N.QG5O_D73pAd3CbClD06h2_OMzcuHKU5qtdGIOG3q_gc2X_FPB6SwkWcqol_vD6ivQUQljYwoGykpq13UTCgfUbw8YcNtPcX0RmN57LpJp0M3jnWJ.c5pEs8OVWR46ZitJzIVSeB8B5bewoob.N3v2dIcsT_Z93dv7eRpvxE47aDfH6FZp9KJsDl60ZbWntXPpJfO.Ij9Lyj1etHqZ3TPKQBInty_pFzoQcbOlC9XGWLLbRsRqEOk4eiPJ942BB8eDEiZ8qR9IqX4NW1tzBByyfndFq1H2EB1A20hZAAC7N_Gw7D3h403pqziH1t6cFFSCBlIwtjb8_Q0fpe1h1fKGon48AMpos36iMS4RxcrqyWKtjWZrtnDocBq.0nXkBVufOOS1MXRpy4ZRJyKuZPJa4LdZK2enJljbsW5SBgn9SUxDUnJ8GlWoTvVKmF2lpnE821Hg9iirI_fxple0hyf9lTfAi7Fj.DVU8wgA7.LXn92S1PROEwPnCDIH_6zTfxH7JllpxWjLehq94prcmysDvtEP3pPvXr2MEMJuR9WpqMz2H8KnfZmwo_aV.dCzsYcddvSn5GoctkkCGWd0eJWafzBHDAsbCcSya7iV8tkukXbCVmymHLzOrVmyIu_aZotf9aWm_hPKWUczViNt8oaHoi5fOHivQ2M93l7KDDyKlFUbnYbzxusflDZHnAILp_dswyGQMTJXpYpCy4J4fiRj3ll3Xo.UWNWmSmivpLtssFeVkwcXu7KUMRN8SUe5uyqb3n4TfSLS8aH50pg9XnyYYHj0U.Uj4hf84.As7TplECc_HUIy5akJiozK3BQ3IRfJ0teJRIUePzUZ4dD6LeWU3_q_Dd.nWa3kzvh_InC31CxwflJrmkl9DANvghCMhIUDxC9gJyyke1Terkg3euCxVWyNhV52mauXBC7TJex6INaGr3pyDeNnyWbrSVSqyuyVJLhLr6giDKflz0rXrVY0O2LMVTeCYxXm2_q_urvZqKzBV1qGZkkLGz6EFX47Ws61VeY82uSYltCQJPzIcGb7c6cvNZ90vtvU7EA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=927da0878d1d3fbd';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/issn\/0027-8424?__cf_chl_rt_tk=hpG1Yf3WrHAXVvyhEBJmOvY0QPqQvH4dV8zyZffF3Bk-1743233061-1.0.1.1-zNW04kD977giRKuCU.dZJrPeuJCtLUjsxbYhs9F15dI" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>