Nitrogen fixation  proceedings of the fifth International Symposium on Nitrogen Fixation with Non-legumes, Florence, Italy, 10-14 September 1990 / 
edited by M. Polsinelli, R. Materassi and M. Vincenzini. 
 - Dordrecht :  Kluwer Academic Publishers,  1991. 
 - 678 p. ;  26 cm. 
 - Developments in plant and soil sciences  48 .
<br/><br/><label>ISBN: </label>0792314107 
<br/><br/><label>Subjects--Topical Terms: </label><br/> Nitrogen--Fixation--Congresses.<br/> Nitrogen--fixing microogranisms--Congresses.