[Geothermal gradient maps of North America].

Bibliographic Details
Corporate Author:	American Association of Petroleum Geologists
Format:	Map
Language:	English
Published:	[Tulsa, Okla.] : American Association of Petroleum Geologists, [between 1970 and 1979?]
Subjects:	Geothermal resources > North America > Maps.

Description
Item Description:	Contour interval 0.20 degrees/100 feet. Projection differs. Blue line print. "Data source: Geothermal survey of North America, sponsored by American Association of Petroleum Geologists." Cartographic material.
Physical Description:	39 maps ; on sheets 77 x 132 cm. or smaller.