G. L. Chopra. A text book of Algae : for B. Sc. students of Indian universities / G. L. Chopra. - 17th ed. - Jullundur : S. Nagin, c 1981. - iii, 376 p. : ill. ; 22 cm. Includes index. 331 331 Subjects--Topical Terms: Algae. Dewey Class. No.: 589.3 / G1e