Gropper, George Leonard <br/><br/>
Criteria for the selection and use of visuals in instruction  a workbook 
George L. Gropper, Zita Glasgow and Jean Klingensmith 
 - Englewood Cliffs, N.J.  Educational Technology Publications  1971 
 - 1 v. (various pagings); 28 cm. 
<br/><br/> 'Prepared by the American Institutes for Research, Pittsburgh, Pennsylvania for the Bureau of Naval Personnel under contract no. N00022-68-C-0106.' 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Visual education--Programmed instruction