Hughes, J.L. <br/><br/>
Programed instruction for schools and industry 
by J.L. Hughes 
 - Chicago  Science Research Associates  1962 
 - 299p. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmed instruction
<br/><br/><label>Dewey Class. No.: </label>P14 H874p