Datta, Arun Kumar,  Dr <br/><br/>
Natural science for classes VI and VII / 
by Arun Kumar Dutta 
 - Calcutta :  Das Gupta,  1935 
 - 226 p. ;  18 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Science--Study and teaching
<br/><br/><label>Dewey Class. No.: </label>507