Clegg, John <br/><br/>
The world of a lake  [kit] / 
by John Clegg 
 - New York :  Focal Point Audio Visual Ltd.,  1977 
 - 52 slides, 1 sound cassette, 1 notes ;  in container,29 X 27 X 8 cm. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Lakes--Ponds