Changing environments  [computer file] 

 - England :  YITM,  1997 
 - 1 computer laser optical disc (CD-ROM):  sd. col.;  12 cm. 
<br/><br/><label>ISBN: </label> RM236.00 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Human ecology<br/>Ecology<br/>Environmental policy