Callender, Patricia. <br/><br/>
Programmed learning :  its development and structure / 
Patricia Callender 
 - Harlow :  Longmans,  c1969. 
 - xii, 120 p. :  ill.;  23 cm. 
<br/><br/> Includes index. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Programmed instruction.
<br/><br/><label>Dewey Class. No.: </label>371.3944  / CAP 1969