Study guide for life :  cells, organisms, population / 
Prepared by P.S. Associates. 
 - Sunderland, Mass. :  Sinauer Associates,  c1977. 
 - xiii, 337 p. ;  25 cm. 
<br/><br/><label>ISBN: </label>0878936742 (pbk.) 
<br/><br/><label>LCCN: </label>90053137 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Molecular biology--Examinations, questions, etc.<br/>Molecular biology--Problems, exercises, etc.