Gilbertson, D. D. <br/><br/>
Practical ecology for geography and biology  survey, mapping and data analysis 
by D. D. Gilbertson, M.Kent, F.B. Pyatt 
 - London  Unwin Hyman  1985 
 - 320p. 
<br/><br/><label>ISBN: </label>0044453752 
<br/><br/><label>Dewey Class. No.: </label>574.5  / N853