Postgate ,J. <br/><br/>
Nitrogen Fixation 

 - London  Edward Arnold  671 
 - pbk 
<br/><br/><label>ISBN: </label>0713126884 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen --fixing microorganisms<br/>Nitrogen Cycle<br/>Root -tubercles