Kumar, Har Darshan . Global and general environment / Textual Documents Har Darshan Kumar and Swati Kumar. - 1st ed / - New Delhi : Anmol Publications , 1997. - 482p. : ill ; 24cm . ISBN: 81-7488-478-5 Subjects--Index Terms: Biology Dewey Class. No.: 574.5 / Ku 96 Gl