The explorer  a century of discovery /  [videorecording] : 
The National Geographic Society 
 - Pittsburg :  National Geographic Society,  1988 
 - 1 videodisc (1 hr. 30 min.) :  sd., col. ;  12 in. 
 - National Geographic Video .
 - National Geographic Video  [videorecording] .
<br/><br/> APD 2420