Gupta V.K. <br/><br/>
Conservation Restoration and Philatelic Chemistry 

 - Delhi  Bhagwan Das Gupta India        1997 
 - 208 
<br/><br/><label>Standard No.: </label>10,654 
<br/><br/><label>Source: </label> Reference Collections 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Philatelic Chemistry