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1992

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United Nations / Environment Programme - Nairobi - 1982(1983) - 1991(1992); 1993(1995); 2001(2002)

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United Nations / Environment Programme - Nairobi : Programme - 1.1974 - 8.1981; 1972/82(1982); 1983 - 1986; 1988 -

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Tolba, Mostafa Kamal (contributor) - 1991

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United Nations / Environment Programme - Oxford [u.a.] : Blackwell - [1.]1987; 2.1989/90(1989) - 4.1993/94(1993); damit …

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United Nations / Environment Programme - Oxford [u.a.] : Pergamon Pr.

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Tolba, Mostafa Kamal (contributor) - 1992 - 1. ed.

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In: Global environment outlook : GEO ; environment for … (1997)

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1994

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United Nations / Environment Programme - Nairobi : United Nations Environment Programme - 1973/80(1981) nachgewiesen

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