Gale encyclopedia of Science.-- 4th ed. / 
K. Lee Lerner and Brenda Wilmoth Lerner, editors. 
 - Farmington Hills, MI :  Thomson Gale,  c2008. 
 - 6 v. (paged continuously) : chiefly col. 
<br/><br/> Includes index 
<br/><br/> v. (paged continuously) : chiefly col. il. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Encyclopedia