R. N. Singh <br/><br/>
Role of blue-green algae in nitrogen economy of Indian agriculture 

 - New Delhi  Indian Council Of Agricultural Research  1961 
 - 175p 
<br/><br/>R. N. Singh: Role of blue-green algae in nitrogen economy of Indian agriculture.  New Delhi.  Indian Council Of Agricultural Research, 1961.--(589.9SIN)   
<br/><br/><br/>ENGLISH 
<br/><br/><label>Dewey Class. No.: </label>589.9  / SIN