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1.
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Cambridge : Cambridge University Press, 1995.
English | G 26 SWA.I |
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2.
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Ottawa [Ontario] : Centre De Recherches Pour Le Développement International (CRDI), 1994.
French | G 26 CRDI.B |
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3.
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Gland, Switzerland : IUCN--the World Conservation Union, 1994.
English | G 252 GLO.G |
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4.
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[Washington, D.C.] : World Resources Institute in cooperation with United Nations Environment Programme, the World Conservation Union, 1995.
Spanish | G 26 NAT |
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5.
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Ottawa : International Development Research Centre, c1994.
English | G 26 IDRC.P |
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