Tribe, Michael A. <br/><br/>
Ecological principles / 
by Michael A. Tribe, Michael R. Eraut & Roger K. Snook. 
 - Cambridge [Eng.] ;  New York :  Cambridge University Press,  1975. 
 - viii, 160 p. :  ill. ;  30 cm. 
 - Basic biology course ; book 4 : Unit 2, Organisms and their environment .
 -  book 4. Basic biology course ; .
<br/><br/>Bibliography: p. 158. and index. 
<br/><br/><label>ISBN: </label>0521206588.  0521206383 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology--Programmed instruction.
<br/><br/><label>Dewey Class. No.: </label>574.52  / TRE 1975