Gupta V K <br/><br/>
Conservation restoration and philatelic chemistry. 

 - Delhi  Bhagwan Das Gupta India         1997 
 - 208p. Bibliography 204-206  cm. 
<br/><br/><label>Source: </label> General Book 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Useful Arts
<br/><br/><label>Dewey Class. No.: </label>MYX46, N7