Sprent, J. I. Sprent, P. <br/><br/>
Nitrogen fixing organisms 
Janet, I. Sprent, Peter, Sprent. 
 - London  Chapman and Hall  1990 
 - vii, 255p,:  pbk.; 
<br/><br/><label>ISBN: </label>041234680 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Nitrogen fixation<br/>Biology of nitrogen fixing organisms