Sethi,Inderjeet Environmental Pollution: causes, effects & control / Inderjeet Sethi, M.S.Sethi and S.A.Iqbal. - New delhi: Commonwealth Publishers, 1991. - xi, 304 p. : ill. ; 18 cm. includes index ISBN: 8171691234 Subjects--Topical Terms: environment. Dewey Class. No.: 363.739 / SEE 1991