Suresh Kumar <br/><br/>
Effectiveness of digit-sum method (programmed instruction) among a group of middle school students in relation to level of achivement 

 -  1976 
<br/><br/><label>Standard No.: </label>11900 
<br/><br/><label>Source: </label> Dissertations 
<br/><br/><label>Subjects--Topical Terms: </label><br/>PSYCHOLOGY