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: "www.un-ilibrary.org",cType: 'non-interactive',cRay: '92a0a1a44f3dfcfa',cH: 'pFACgNY4ywsSoENDLf1lQ4DCaliEfTyW_r1aCrsi5es-1743600108-1.2.1.1-9si9behV.JJDQrkGOyTpoPY34pFF19UyjRn1EvXrqqJMyA4XS9C6qiQL8KSZhjLg',cUPMDTk: "\/content\/books\/9789213629680c003?__cf_chl_tk=WCZ7B3iko8D24YTJKMt.hIDKSWxezBDLgFDkVoyaXcI-1743600108-1.0.1.1-1iMjplskrB53Tj9LjRDM6Kp2_kTS0_Oc_QBnNXhWyi0",cFPWv: 'b',cITimeS: '1743600108',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/content\/books\/9789213629680c003?__cf_chl_f_tk=WCZ7B3iko8D24YTJKMt.hIDKSWxezBDLgFDkVoyaXcI-1743600108-1.0.1.1-1iMjplskrB53Tj9LjRDM6Kp2_kTS0_Oc_QBnNXhWyi0",md: "AjcaEPUO97bmPwJk_gNcrLcI2ZUr5IjBUYZViOYYUOs-1743600108-1.2.1.1-PXcDJ4R.o6mqbRSFB2s2Xpsafmn.GNB8p3ISF1bxMkmbRqt1POvzumYkoGiOwWUvYSzmleay8KOX22YtCu5qIvsTJtK3bejll8hG9ZQHXCqLMz053tnmlli8iAvxKwDLCLu.NWceSFwr2hSXYLHDEKWXBgxj_RVbY6p5zEnYFnm8W9qbPJTQiLkZ4BrTrwpDqeRTi_H5yzxgcdhoMAnQiRuPSP_2VEArozruI_JjgHt_TDkdkvXXWMAQZltsa7nEX93dl9tVn._.HB7lltvLCKVJ1dLvH4aNvO_hKy44uHJviHbu6LzgIGgG_odDoWwrWV9MxZmPXOn51dU0VaOMYGkdZbT5tLggejHkL3pa2MxvLpabjK7o1OSYPj7_7negembKlFFZBID.hvLPb8s1C4I_KdxAUo186i.x2tj2C1lNXL43eN3_1JHZDCR6gjXfHb4Wa7SWbDhL5FZ2D1r6.ayv5HYdOuBY4niKmEs7zlLLsE4drJIn.GkRnNVjqlpNLeGKrQuZiSZLOsMo9yFovYHDlqcSFQXQbqlJWcnaWK4a4jGp6kgDt_rm33LpVinHEHD4EW8Dy5bDSY4GZri00f64EdhdCMSNNx72e675lyIUwMU47ynLNfFrgJ8DCz1WaaZo5brFWkIy6x.MHvpWVgT4aGDY20gUVgPrkW7WYgNb09jKtnd7TGUZes0_Q32yIPaizRA6Iv1ctSLOzZrgtTv9pIIwA6Zkj8GVSWS4D7PBy97hhcConTPRj6Wer41h.I3DXn5YWl4fdo_cnZB8EL83zxXmNMoq_lRJImVcjvZZLEoF4n5D993iYRLhNZsUSybJI88v3x4bx4IhutYG4hb5IyDWWlwT_uTWQZcUaIfL4et9B22U6CC0fUGtOBzTN.YECOpFusFjJIavtVNk9tpK48eNtsh_G5L8e5zpt2zo4DmT3sCaudqmQdbmVgVY67nRPmPGcWdVHrfaGjP5NYF.zFUAZr5u.urLu5BBnvsk0iaJXgYb6IqE9EQNoPwlcF7vl_iD1sHwiu83PWB66pWWrSAZs6jyeP3hh2_.k9MuvjqeaW8QlbElS6_k1O44uZo83lFIGgaw33rnwq4491aWatg26rEsq0GyjoaPlLokiuMrxDwotfmLEL.SbjEB",mdrd: "sHyZdl2ZKwt7lscK_l2lzyJ617.pVsioDm1jCt2SRLY-1743600108-1.2.1.1-4fHGY02v0WWYPm_YuIlu_2G8pIrXPEiPSbwQN6N.Cm4ebkjyMK3g4ruFuIAxPKQ5wEe.TGU8aQaCAcdR1hQP9HVjhFPO.6gR3MWNZ3Me69LpGO.cJd.Xwr0XzpszgAW0xoQs3h7NWpWxqoH2uCAewUBWU_BNPzrnZf4f9ha00BjaQZnmMcVgT0iRwR6Efd0RnxUs.YkdDO0l726rLBTvu283.w8LPmlztprRIrulBwGMPS3.jfeMpErov48597yBN_XS3cIbahClJLzUc81zY9wTzoBV1mtUxfY2x4RzZx65aY6ojk6lmNeGOVdMqJ032hLE2hHCYxpQf0LJaNohKvK7KLvMZB7uSFR_ID4zfeeU0mZ36YIttEXFMxE0QJLCBZnDuYqQ71S0LeNmzUOeeDY1tWdrc1ieDrBLdfmccXBvX3hzDzqH.idHuLarC7S_HJgoz5ufmfaQjDdOlMgIan5QLpnTDbNFqrekMUmHj8LE7IprySqmN93n.wu0dWJ8pPOW66WFkp9aH9eHovawQ8Rb8PPki.0_yxBlJYxImPHlAF1lEpfob_t7awBNA9K57hDFUPRzgI2F53dsOMj7qtN65RTFh1POC4LmW3m3bz9.tdJmRiAhZ6auN5ogLp5NJ93SdnuLCFg8jbkzMBjK.0ZRbrCjPDCyXBceF6ZAyoof508zs12qz6SwTLRHXtXNV_rYXnbsxuDKmco7gCjJTc_D9TEWyJOjNG_DYt7Oi46GO8zUn7lbUdBHmRNY1Ged8.qr8QVE2TqlEKwFh0.tIa3y8qjR_2gFUrU2dqVUSkwSxT8VQWGFScTLUg_NioWOnHSCWvI2XGxsDy5sUGRPiaVbnLQzZqT0uv9xxeNS_G7S7FCnK1p2_BfBJnSojfXjl4CZa2irZYfq2sz6ZbOVpyCH05D4eVjKPYp.skGEX_0Fh0hhw2ud9a0TWLVY8VQ3ZyLTR_teKdnU52UQouAPDesN9RkrWj8W6378JHr1XmZ169LJp7Y11yFOw7s0bP3YYXzLFbDEuLqyyCIDpLq8.5DNMt6ruOS29946aIVlawy8ISId0MWWkG3XbTXE_FuXNUQZVr8RtG.k7_.mOuAAgqkXaLyRzDueHHCipZLQSMZn909.EvESceCZuJ6Hs__jDU2zq8rOVPQ4Q15.qJYOroVL2iWwSMLCoQjihrotja7pgiYQyD_b6crYKqSHMEhN1sMUMAyrDZHm25vWW1ScSIwnpy4OqQFpZad5_nspxVizeVZcD0jjODjaBo.nX79b0u1n87SReR7w_nmkaYVGvpt3pYrMCRwO9OSlWoGAGZe9oghEMM.71d_.uv7sqEh5ckka_FuQ9SS9fiQJH7CwREvbu6YEsSBCuTbis00qNyR.OmaPRVL3V35qh8slVgCzHyGMPG7BWT8XfZw49q9o4mSoKNd9tpEF4ZSMKNo36._nT5yjPveByXVrVR3JA1zE7Kv4E3bxb2dYMsjU3R6D6Rxw9Hr8LjGbcypnwAAGBsFKsRKL3AkQdp9X8Sgbnddu6VhCl1lL5LxBnZK0BdO_.I0sL7T9R3_fpSr2Y1NFMNorrAe4Ma4R6slcZphmaYzKQJhh4ne83nnODfl4KiRCqwjBtQRZlcoh5s_FxBixX94QhkGRRwnRfWrBUH1wccmWV3PEThDrD03OfXN0.q9_Titk6MkheoVmhb63q6eRHfmYvKNhqc0HBj3A7hj1VNRUiaQ0tbl_meHPuZ8XV_Rff0tE9QX2T9BQn8m9I60242fDKoX2SAzrV3znNb0gR2kdIuoQ9Erm0KLZbiWlb2Iig0s4yPeyVkSn2wM9RFNgO9VOZJrmlIXAp6rxJ7aCNh5LF6zdCWPkhIMPJI.XKsDal01agHbAJvBg1Vib0CXFookjNy1zA0h_6EGv1i5ZHvGHlA8E8ZVZqxpdL1h_tFj0ADtZEaoSZ9LJjk3rqYtTK4AGrF9ajenY7J8su6hi0tr54wi0YM.WXO3bLU1dyDbyeRgNbq5v5TJrs313Ydoxg5PSz5XrfIJHT8tpizHz57JGAg.zPSqbJvLUKXb7XfczCA"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=92a0a1a44f3dfcfa';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, "\/content\/books\/9789213629680c003?__cf_chl_rt_tk=WCZ7B3iko8D24YTJKMt.hIDKSWxezBDLgFDkVoyaXcI-1743600108-1.0.1.1-1iMjplskrB53Tj9LjRDM6Kp2_kTS0_Oc_QBnNXhWyi0" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>