WHITLOW, Jesse W.
Geology of the Dubuque North Quadrangle Iowa-Wisconsin-Illinois / by Jesse W. Whitlow and C. Ervin Brown. -- Washington : United States Government Printing Office, 1963 - P. 139-168 + map. -- (Geological Survey Bulletin ; 1123-C).
Geología
Illinois
Iowa
Wisconsin
55(77)
Geology of the Dubuque North Quadrangle Iowa-Wisconsin-Illinois / by Jesse W. Whitlow and C. Ervin Brown. -- Washington : United States Government Printing Office, 1963 - P. 139-168 + map. -- (Geological Survey Bulletin ; 1123-C).
Geología
Illinois
Iowa
Wisconsin
55(77)