Sensory mechanisms  [slide]  / 
prepared by David W. Macdonald 
 - Burlington :  REX Educational Films Co.,  1983 
 - 20 slides :  col. ;  5 X 5 cm. 
 - Animal Senses series  part 1-2 .
<br/><br/> Visions -  Hearing  part 1.  part 2. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Senses and sensation