Halsey, William D. <br/><br/>
Collier's Encyclopedia with Bibliography and Index Vol. XI (Germanium-Health Hen). 

 - New York :  Macmillan Educational Co.,  c1990. 
 - 761p.  illus (pbk)  26cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and Dictionaries--c1990--New York--Paperback