Pond-life food web  [videorecording] / 
a National Geographic Society educational film presentation in association with Oxford Scientific Films, Ltd. 
 - Washington, D.C. :  The Society,  c1976, 1986. 
 - 1 videocassette (10 min.) :  sd., col. ;  1/2 in. +  1 teacher's guide ([1] p. ; 12 x 20 cm.) 
 - Bio-science series. .
<br/><br/> Examines the microscopic world of a pond, identifying its inhabitants and their interrelationships, including the complex pattern of food chains within the pond. 
<br/><br/><br/>VHS format. 
<br/><br/><label>Publisher. No.: </label>No. 51174  National Geographic Society 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Food chains (Ecology)<br/>Freshwater ecology.<br/>Pond ecology.