Instructional media and technologies for learing / 
Robert Heinich...[et al]. 
 - 6th ed. 
 - Upper Saddle River, NJ ; Columbus, Ohio :  Merrill,  1999 
 - xix, 428 p. :  ill. ;  25 cm.  +1 cd 
<br/><br/>Includes bibliographical reference and index 
<br/><br/><label>ISBN: </label>0138591598 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Educational technology<br/>Audio-Visual education
<br/><br/><label>Dewey Class. No.: </label>371.33  / I59 1999