Postlethwait, S. N.  1918- <br/><br/>
The audio-tutorial approach to learning, through independent study and integrated experiences / 
S. N. Postlethwait, J. Novak and H. T. Murray, Jr. 
 - 3rd ed. 
 - Minneapolis :  Burgess Pub. Co.,  1972. 
 - ix, 184 p. :  illus. ;  26 cm. 
<br/><br/>Includes bibliographical references. 
<br/><br/> Open access. 
<br/><br/><label>LCCN: </label>70187724  
<br/><br/><label>Subjects--Topical Terms: </label><br/>Audio-visual education.<br/>Programmed instruction.<br/>Botany--Study and teaching.