World Environment Day June 2010 Bio-diversity connecting with nature - many species, one planet, one future / [Book] : Pakistan Engineering Congress. - Lahore : Pakistan Engineering Congress, 2010. - 160 p. ; 22 cm. All. Subjects--Topical Terms: Arid regions--Conservation--International cooperation.Desert ecology--Conservation--International cooperation.Desertification. Dewey Class. No.: 636.7