Primary production, the process ; Primary production in ecosystems; Consumers in ecosystems 
prepared by an Open University Course Team (i.e. the S323 Course Team) 
 - Milton Keynes  The Open University Press  1974 
 - 9,37,3-57,61p ill(some col) 30cm Pbk 
 - Ecology ; block A .
<br/><br/><label>ISBN: </label>0335041507 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Ecology