McKown, Harry C.  1892-1963. <br/><br/>
Audio-visual aids to instruction / 
by Harry C. McKown...and Alvin B. Roberts.. 
 - 2d ed.  
 - New York and :  London :  McGraw-Hill book company, inc,  1949 
 - xvi, 608 p. :  ill. ;   24cm 
 - McGraw-Hill series in education, Harold Benjamin, consulting editor .
 - McGraw-Hill series in education, Harold Benjamin, consulting editor .
<br/><br/> "Selected references" at end of each chapter except chapter III. "Sources of materials and equipment": p.579-595 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education
<br/><br/><label>Dewey Class. No.: </label>371.33  / MCA 1949