Roy Shankarshan Bhu Prakriti Bijnan Roy Shankarshan - Delhi Jnanbichitra India 2002 - 160p. cm. ISBN: 180 Standard No.: 265481 Source: M/2008/17, 08/02/2008, Mukta Dhara Textual Subjects--Topical Terms: BIOLOGY Dewey Class. No.: G:55, 157P2