Britannica yearbook of science and the future, 1970. 

 - Chicago :  Encyclopaedia Britannica,  c 1969. 
 - 448 p. :  ill. ;  28 cm. 
<br/><br/> Includes index. 
<br/><br/>66  66 
<br/><br/><label>ISBN: </label>85229 145 0 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Science dictionary. 
<br/><br/><label>Dewey Class. No.: </label>503 / B777