Our dynamic Earth.
Our dynamic Earth. [motion picture] /
National Geographic Society.
- Washington : The Society, c1979.
- 1 reel, 23 min. : sd.,col. ; 16 mm. & teacher's guide.
Title from data sheet. Also issued as videorecording.
Examines information about continental drift gathered from deep sea research.
80700159 /F
Continental drift.
QE511.5
Title from data sheet. Also issued as videorecording.
Examines information about continental drift gathered from deep sea research.
80700159 /F
Continental drift.
QE511.5