Gropper, George Leonard. <br/><br/>
Diagnosis and revision in the development of instructional materials 
George L. Gropper. 
 - Englewood Cliffs, N.J.  Educational Technology Publications  1975. 
 - xv, 211 p.  ill. 
<br/><br/> Includes index. 
<br/><br/>Bibliography: p. 193-195. 
<br/><br/><label>ISBN: </label>0877780838 
<br/><br/><label>LCCN: </label>75014252  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Teaching--Aids and devices.<br/>Programmed Instruction
<br/><br/><label>Dewey Class. No.: </label>371.3078  / G876d