Singh,N.K. <br/><br/>
Encyclopaedia of the World Scientists (Vol-9)P to S   

 - 1st /   2004. 
 - Delhi:  APH Publishing Corporation.  2004. 
 - 910p:  27cm. 
<br/><br/><label>Subjects--Personal Names: </label><br/>Encyclopaedia, World Scientists. 
<br/><br/><label>Dewey Class. No.: </label>509.2030