Goodman, Richard  <br/><br/>
Programmed learning and teaching machines  an introduction 
Richard Goodman revised by R. W. Lyne 
 - 3rd edition 
 - London:   English Universities Press,   1967. 
 - 48 pages :    illustrations ;    21 cm. 
<br/><br/>pages 46-47 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmed instruction<br/>Teaching machines