RAJ (Gurdeep) & MEHRA (Harish). <br/><br/>
Photo-chemistry. 

 - Meerut  Goel Publishing house  1972 
 - iv,72 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photo-Chemistry
<br/><br/><label>Dewey Class. No.: </label>541.35 RAJP