Trivedi, P.R.. Encyclopaedia of Environment, Pollution, Planning And Conservation : State of India`s Environment Vol-1 / by P.R. Trivedi. - 1st ed / - New Delhi : APH Publishing Corporation , 1985 - 225p : ISBN: 81-7648-001-0 Subjects--Topical Terms: Encyclopaedia Dewey Class. No.: G:55K / N8.1