Subra Rao, Nanjappa Shamana  1926- <br/><br/>
Biofertilizers in agriculture / 
N. S. Subba Rao 
 - New Delhi :  Oxford & IBH Publishing,  1982 
 - ix, 186 p. :  ill. ;  21 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Fertilizers and manures