Enviroment 89/90  Annual editions  Físico 
Enriroment 89/90,  / Allen, John, editor 
 - Virginia USA:  The Dushkin Publishing Group,  1989 
 - 209p. :  il. ; 27cm. 
<br/><br/><label>Subjects--Topical Terms: </label>
<br/><br/><label>Dewey Class. No.: </label>301.3105 A613:8  / 1