Abrol, Y.P. <br/><br/>
Nitrogen  Soils, Physiology, Biochemistry, Microbiology, Genetics 
Y.P. Abrol ... [et al]. 
 - New Delhi  Indian National Science Academy  1993 
 - 283p., ill.; 24cm. 
<br/><br/><label>Dewey Class. No.: </label>631.84  / A17N