Hyatt, D. E. <br/><br/>
Biological populations as indicators of environmental change :  volume 1 / 
by: D. E., Hyatt. 
 - Washington, D. C., USA :  U. S. Environmental Protection Agency,  1992. 
 - 146 p. :  il. tablas, mapas ,  27 cm. 
<br/><br/><br/>Ingles 
<br/><br/><label>ISBN: </label>0160426154  Normal 
<br/><br/><label>Dewey Class. No.: </label>577.2