1993 information please environmental almanac 

 - Boston  Houghton Mifflin Co  1993 
 - 656p.  ill.  20cm. 
<br/><br/>Includes bibliographical references and index 
<br/><br/><label>ISBN: </label>039563766X 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Environmental protection, <br/>Human ecology, <br/>Ecology, <br/>Conservation of natural resources
<br/><br/><label>LC Class. No.: </label>GF1.A15