Water quality of world river basins /

Water quality of world river basins / written and produced by UNEP GEMS collaborating Centre for Fresh Water. - Nairobi, Kenya : United Nations Environment Programme, 1995. - 40 p. : il. (principalmente il. col.) ; 26 cm. - unep environment library ; no. .

Incluye bibliografia.

92-1-100607-4

TD370 / W38 1995

Con tecnología Koha