Bedrock topography of east-central Iowa /

Bibliographic Details
Main Author:	Hansen, Robert E.
Corporate Authors:	Geological Survey (U.S.), Iowa Geological Survey
Format:	Government Document Map
Language:	English
Published:	Washington, D.C. : U.S. Geological Survey, 1972.
Series:	Miscellaneous geologic investigations ; map I-717.
Subjects:	Geology > Iowa > Maps. Iowa > Maps.

Description
Item Description:	"Prepared in cooperation with the Iowa Geological Survey." Cartographic material.
Physical Description:	1 map on 2 sheets : color ; 84 x 124 cm., on sheets 97 x 78 cm., folded in envelope 30 x 24 cm.
Bibliography:	Includes bibliographical references.