Rao, K.S. . Recent Advances in Fresh-Water Biology Vol.I / Textual Documents K.S. Rao. - 1st ed. / - New Delhi : Anmol Publications , 1993. - 322p. : ill ; 22cm . ISBN: 81-7041-753-8 Subjects--Index Terms: Zoology Fresh water biology PG-Zoology Dewey Class. No.: 574.87 / Ra 18 Re