Hughes, John Leo 1929 <br/><br/>
Programed instruction for schools and industry 

 - Chicago  Science Research Associates  1962 
 - 299p.  26cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmed instruction
<br/><br/><label>LC Class. No.: </label>LB1028.5.H8