Wratten, Stephen D. Fry, Gary <br/><br/>
Field and laboratory exercises in ecology 
Stephen D. Wratten , Gary L. A. Fry 
 -  Edward Arnold London  1980  c1980 
 - x , 227 p. ; 23 cm. 
<br/><br/> Bibliography : p. 213-220 
<br/><br/><label>ISBN: </label>0713127252 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology - Problems , exercises , etc.--QH
<br/><br/><label>LC Class. No.: </label>QH541.W7