Gerking, Shelby Delos,  1918- <br/><br/>
Biological systems / 
by Shelby D. Gerking. 
 - Philadelphia :  W. B. Saunders,  1969. 
 - xiv, 480 p. :  illus., (part col.)  27 cm. 
<br/><br/>Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology.
<br/><br/><label>Dewey Class. No.: </label>570  / GEB 1969