Gerking, Shelby Delos, 1918- <br/><br/>
Biological systems 
by Shelby D. Gerking 
 - 2nd ed. 
 - Philadelphia  Saunders  1974 
 - 506 p. : ill. ; 27 cm. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0721641066 
<br/><br/><label>LCCN: </label>73-081831 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biological systems