Regionalization as a tool for managing environmental resources /  
Alisa L. Gallant ...[et al.] 
 - Washington, D.C. :    United States Environmental Protection Agency,    1989. 
 - 152 p. :    ill. ;    30 cm. 
<br/><br/>  EPA/600/3-89/060 
<br/><br/>Includes bibliographical references 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Natural resources.<br/> Environmental protecion
<br/><br/><label>Dewey Class. No.: </label>339.49