Ajay,(Dr.) <br/><br/>
Encyclopaedic dictionary of science / 
Ajay. 
 - New Delhi :  Sarup & Sons,  1999. 
 -  Vol. 3 ( P-Z ) .
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Encyclopaedias.
<br/><br/><label>LC Class. No.: </label>Q121  / .E53