Encyclopedia of the United States in the nineteenth century.  Vol. 3,  Printing Technology - Zoos / 
Ed. in chief P. Finkelman. 
 - New York :  Charles Scribner's Sons,  2001. 
 - 566 p. 
<br/><br/><label>ISBN: </label>0-684-80499-9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>United States - Civilization - Encyclopedias