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Map showing mineral resources of Montgomery County, Maryland /

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Bibliographic Details
Main Author: Froelich, A. J. (Albert Joseph), 1929-
Corporate Author: Geological Survey (U.S.)
Format: Government Document Map
Language:English
Published: Reston, Va. : The Survey, 1975.
Series:Miscellaneous investigations series (Geological Survey (U.S.)) ; map I-920-E.
Subjects:
Mines and mineral resources > Maryland > Montgomery County > Maps.
Description
Item Description:Relief shown by contours and spot heights.
"Contour interval 20 feet."
Includes location map, table, and text.
Cartographic material.
Physical Description:1 map : color ; 78 x 102 cm., folded in envelope 30 x 24 cm.
Bibliography:Includes bibliographical references.