Educational technology :  the design and implementation of learning systems. 

 - 86 pages :  illustrations ;  24 cm 
<br/><br/><label>LCCN: </label>70865094 
<br/><br/><label>Nat. Bib. No.: </label>F*** 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching--Aids and devices
<br/><br/><label>LC Class. No.: </label>LB1043  / .E38 1971 
<br/><br/><label>Gov. Doc. Class. No.: </label>OECD  C395  E24