Foltz, Charles I. <br/><br/>
The world of teaching machines :  programed learning and self-instructional devices / 
Charles I. Foltz. 
 - Washington :  Teaching Research and Technology Division, Electronic Teaching Laboratories  c1961. 
 - 115 p. :  illus. ;  24 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching machines.
<br/><br/><label>Dewey Class. No.: </label>371.3944  / FOW 1961