Science Year 1991 

 - Chicago:  Pub.World Book, Inc.  0 
 - 400 p. 
<br/><br/><label>ISBN: </label>716605910 
<br/><br/><label>Subjects--Index Terms: </label>Science Year 1991 : The World Book Annual Sceince Supplement.  
<br/><br/><label>Dewey Class. No.: </label>503  / S416