Annual editions :  Environment. 

 - Guilford, Connecticut :  McGraw-Hill. 
 - v :  ill. 
 - Annual, 
 - 23rd ed. (02/03) 
<br/><br/><label>ISSN: </label>0272-9008 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection--Periodicals.<br/>Pollution--Periodicals.<br/>Ecology--Periodicals.