Annual editions :  environment 99/00 / 
edited by John L. Allen 
 - 18th ed. 
 - Guilford, Conn. :  Dushkin Pub. Group,  1997 
 - 229 p. :  ill. ;  28 cm. 
<br/><br/><label>ISBN: </label>0072284986  RM72.16 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental sciences<br/>Human ecology