This scanned and georeferenced map, dated 07/01/1956 and with author(s): Iowa Geological Survey and may be a working/reference document. This is a document preserved for historical and/or reference purposes.
Summary
This scanned and georeferenced map, dated 07/01/1956 and with author(s): Iowa Geological Survey and may be a working/reference document. This is a document preserved for historical and/or reference purposes.