LUMPKIN, Thomas A. <br/><br/>
Azolla as a Green Manure use & Management in Crop Production 

 - Colorado.  Westview Press,  1982 
 - xx,230p. 
<br/><br/><label>ISBN: </label>0-89158-451-x 
<br/><br/><label>Dewey Class. No.: </label>631.874