Elkan, Gerald H. <br/><br/>
Current issues in symbiotic nitrogen fixation : proceedings of the 15th North Am 

 - Boston  Kluwer Academic Publishers  1997 
 - ix,198 p. 
<br/><br/><label>ISBN: </label>0-7923-4367-0 
<br/><br/><label>Dewey Class. No.: </label>572.345