Kay, Harry,  1919- <br/><br/>
Teaching machines and programmed instruction / 
by Harry Kay, Bernard Dodd, Max Sime 
 - Harmondsworth :  Penguin Books Ltd.,  1968 
 - 173 p. :  ill. ;  19 cm. 
<br/><br/>Bibliography: p. 9 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching machines<br/>Programmed instruction