World Environment Day June 2009 on the theme of your planet needs you-unite to combat climate change / [Book] : Pakistan Engineering Congress. - Lahore : Pakistan Engineering Congress, 2009. - 144 p. ; 22 cm. All. Subjects--Topical Terms: Arid regions--Conservation--International cooperation.Desert ecology--Conservation--International cooperation.Desertification. Dewey Class. No.: 636.7