The encyclopedia americana  volume 29: Wilmot Proviso to Zygote/ 

 - International   Edition 
 - Danbury, Connecticut:  Grolier Incorporated,  1993. 
 - 827 pages:  images;  26 cm. 
<br/><br/><label>ISBN: </label>0717201244 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Encyclopedias and dictionaries.
<br/><br/><label>Dewey Class. No.: </label>031  / En192