The New book of popular science / 
Grolier. 
 - [S.I.] :  Grolier,  c1992. 
 - 6 v. :  col. ;  26 cm 
<br/><br/> Includes bibliographical references. 
<br/><br/><label>ISBN: </label>0717212181 (6v. set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Earth sciences
<br/><br/><label>LC Class. No.: </label>Q162   / N42 1992 v.2