Britannica. <br/><br/>
Compton's by Britannica.P-Phos. 

 - 1st 
 - USA  Britannica  2007 
 - 328 
<br/><br/><label>ISBN: </label>1-59339-298-2 
<br/><br/><label>Subjects--Topical Terms: </label><br/>General Books