Surficial geology of the Ayer quadrangle, Massachusetts /

Bibliographic Details
Main Author:	Jahns, Richard H. (Richard Henry), 1915-1983
Format:	Government Document Map
Language:	English
Published:	Washington, D.C. : U.S. Geological Survey, 1953.
Series:	Geologic quadrangle map ; GQ-21.
Subjects:	Geology > Massachusetts > Middlesex County > Maps. Geology > Massachusetts > Worcester County > Maps.

Description
Item Description:	"Datum is mean sea level." Includes inset map. Includes references and text. Cartographic material.
Physical Description:	1 map : color ; 44 x 33 cm. on sheet 76 x 128 cm., folded to 76 x 64 cm.