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After the earth summit :

By French, Hilary F.. Washington : Worldwatch Institute (WI) , 1992 . Various pages : 20 cm. .

By French, Hilary F.. Washington : WI , 1993 . 74p. : 20 cm..

By French, Hilary F.. Washington : Worldwatch Institute (WI) , 1995 . 71p. : 20 cm. . 1878071270

By | French. Washington | 1990 | WI US | . | 62p