The total intensity of the Earth's magnetic force expressed in centimeter-gram-second units : Epoch 1965.0.

Bibliographic Details
Corporate Author:	United States. Naval Oceanographic Office
Format:	Map
Language:	English
Published:	Washington : The Office, 1966.
Edition:	3rd ed.
Subjects:	Geomagnetism > Maps.

Evans: Maps (2nd floor) (Does not check out)