Chauhan, S.S.. <br/><br/>
A Textbook of Programmed Instruction /  

 - Reprinted 1985 /  
 - New Delhi-16 :   Sterling Publishers Pvt. Ltd. ,   1954 
 - p.192,viii :  
<br/><br/><label>ISBN: </label>81-207-0144-5 
<br/><br/><label>Dewey Class. No.: </label>T:(B)  / M2;3