Tribe, Michael A. <br/><br/>
Ecological principles / 
Michael A. Tribe, Michael R. Eraut & Roger K. Snook 
 - Cambridge :  Cambridge University Press,  1975 
 - viii, 160 p. :  ill. ;  30 cm. 
 - Basic biology course  4 .
<br/><br/>Includes bibliographies ( p. 158) and index 
<br/><br/><label>ISBN: </label>0521206588 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Programmed instruction