Caves  the dark wilderness /  [motion picture] : 
made by Avatar Learning Incorporated, Reid-Cowan Productions ; producer: Mathew N. Herman 
 - Chicago :  BEC,  1976 
 - 1 film reel (22 min.) :  sd., col. ;  16 mm. +  teacher's guide 
<br/><br/> Explores the ecology of caves, showing how animals have adapted to life in a cave. Explains the creation of internal cave formations from the traces of himerton in canoes, water, earthquakes and desert winds  Bahan rosak (Lupus) 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Caves<br/>Cave ecology