The new Encyclopædia Britannica/  Volume 19,  Excretion Geometry. 

 - 15th ed. 
 - Chicago:  Encyclopaedia Britannica, Inc.,  c1995. 
 - 937 pages :  illustrations (some color), photos ;  28 cm. 
<br/><br/> Volume 19 of the Macropædia, Knowledge in Depth. 
<br/><br/>Includes bibliographical references and index. 
<br/><br/><label>ISBN: </label>0852296053 (cb.)