Troyer, Donald L, et al. <br/><br/>
Sourcebook for the biological sciences 

 -  Macmillan & Co. Ltd., New York  1972 
 - 176 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Biology
<br/><br/><label>Dewey Class. No.: </label>574  TRO-S