Great Lakes Region gravity and magnetic map sequence. MC-37, Lake Superior area /

Bibliographic Details
Main Author:	O'Hara, Norbert W.
Corporate Author:	Geological Society of America
Format:	Map
Language:	English
Published:	Boulder, Colo. : Geological Society of America, 1981.
Series:	Map and chart series (Geological Society of America) ; MC-37.
Subjects:	Gravity anomalies > Superior, Lake > Maps. Magnetic anomalies > Superior, Lake > Maps.

Description
Item Description:	Title from envelope. Cartographic material.
Physical Description:	2 maps : color ; 51 x 86 cm. folded in envelope 23 x 31 cm. + 1 text (12 pages : maps ; 28 cm.)
Bibliography:	Includes bibliographical references.