The grolier children's encyclopedia:  hippopotamus-lungs/ 

 - London :  Grolier Danbury, Connecticut,   2002. 
 - 193-240 pages, volume 5 :  colored illustrations ;  30 cm. 
<br/><br/><label>ISBN: </label>0753403110 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Hippopotamus.<br/>Lungs.
<br/><br/><label>Dewey Class. No.: </label>030  / G89