TY  - RPRT
TI  - Bedrock contour maps of the Lower Great Miami River valley, Ohio
AU  - A. M. Spieker
AU  - J. S. Watkins
PY  - 1967
DO  - 10.3133/ofr67205
UR  - https://pubs.usgs.gov/publication/ofr67205
ID  - ofr67205
ER  -