Obaidur, Rahman M. <br/><br/>
Effectiveness of instructional materials in teaching social studies in grades IV, V, and VI in schools of Dacca, Pakistan / 
Obaidur M. Rahman 
 - Colorado :  Colorado State College,  1968 
 - 125 p. :  ill. ;  22 cm. 
<br/><br/><label>ISBN: </label> USD 56.92 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Social sciences
<br/><br/><label>Dewey Class. No.: </label>371.3063