Biswas, P K <br/><br/>
Commercial letters 
P K Biswas 
 - Calcutta:  Ratan Book Agency, 
 -  240p. 
<br/><br/><br/>eng 
<br/><br/><label>Subjects--Topical Terms: </label><br/>English letters
<br/><br/><label>Dewey Class. No.: </label>826  / BIC