The new book of popular science. 

 - 6 v. :  col. ill. ;  26 cm. 
<br/><br/> Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0-7172-1225-4(set) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Encyclopedia, Juvenile.<br/>Technology--Encyclopedia, juvenile.<br/>Medicine--Encyclopedias, juvenile.<br/>Science--Popular works.<br/>Technology--Popular works.<br/>Medicine, Popular.