Kent, Graeme. <br/><br/>
Blackboard to computer:  a guide to educational aids. 

 - London,  Ward Lock,  1969. 
<br/><br/>Includes bibliographies. 
<br/><br/><label>ISBN: </label>0706230469  30/- 
<br/><br/><label>LCCN: </label>70395585 //r73 
<br/><br/><label>Nat. Bib. No.: </label>B69-06679 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching -- Aids and devices.--Teaching -- Aids and devices.
<br/><br/><label>LC Class. No.: </label>LB1027  / .K42 
<br/><br/><label>Dewey Class. No.: </label>371.33