00356cam a22001217a 4500 180718b1992 xxu||||| |||| 00| 0 eng d O91 B469 Bhargava, Gopal Environmental challenges and ecological disaster: global perspective by Gopal Bhargava Delhi Mittal 1992 247p. Environment 335148 335148 0 0 0 0 IIPA IIPA 1992-11-17 O91 B469 66413 2018-07-21 2018-07-21 BK