Das, Guru Sharan. Environmental science : a global concern / Guru Sharan Das. - New Delhi : Random Publications, 2015. Includes bibliography. ISBN: 9789351115274 (hbk.) LCCN: 98903903 Subjects--Topical Terms: Environmental sciences. LC Class. No.: GE5 / .A28 Dewey Class. No.: 628 / DAS