Ray, P. Ecological imbalance of the Ganga river system : its impact on aquaculture / P. Ray. - Delhi : Daya Publishing, 1998. - 241p HB ISBN: 8170351952 695 Standard No.: 8542 [old SOUL v1.0 record id] Subjects--Topical Terms: Aquatic ecology - Ganges River Dewey Class. No.: 577.640954 / R 211 e