Gerking, Shelby D. 1918-1998 Biological systems : a laboratory manual / Shelby D. Gerking - Minneapolis, Minn. : Burgess Publishing Com., ©1970. - x,135.p.: table, figs., ill.; 28 cm. English Subjects--Topical Terms: BiologyBiological systems Dewey Class. No.: 570.724/GEB