1990 Science Year :  The World Book Annual Science Supplement/ 
World Book, Inc. 
 - Chicago, London:  Scott Fetzer Company,  c1990. 
 - 385p.;  ill.  22cm 
<br/><br/> Includes index and  bibliographical references. 
<br/><br/><label>ISBN: </label>0716605902 
<br/><br/><label>LC Class. No.: </label>REF  Q 9  / .S33 1989.