Das, K.S. . Outlines of Biology / Textual Documents K.S. Das and J.B. Mookerji. - 9th ed. / - Calcutta : New Central Book Agency , 1983. - xxxi,422p. : ill ; 22cm . Index ISBN: 81-7381-099-0 Subjects--Index Terms: Biology G-Biology Dewey Class. No.: 574 / D 26 Ou