Hansen, Alexander P. <br/><br/>
Symbiotic N(2 en indice) fixation of crop legumes  : achievements and perspectives 
/ Alexander P. Hansen 
. - Weikersheim  : Margraf Verlag, 1994
. - VIII-248 p.  : ill., couv.ill.  ; 20 cm. 
 - Hohenheim Tropical Agricultural Series  09414894 .
<br/><br/>Bibliogr. Index 
<br/><br/><label>ISBN: </label>3823612352 
<br/><br/><label>Universal Decimal Class. No.: </label>635.4