The Invisible world  [videorecording]. 

 - Washington, D.C. :  The National Geographic Society,  1979. 
 - 1 videocassette (59 min.) :  sd., col. ;  1/2 in. 
<br/><br/> Vast worlds exist beyond the limited range of human vision. A variety of highly specialized cameras and imaging devices show us the world as we have never before seen it. 
<br/><br/><br/>VHS. 
<br/><br/><label>Subjects--Topical Terms: </label><br/>Photography--Scientific applications.