TY  - BOOK
AU  - Marshall,R.B.
ED  - Geological Survey of Ohio.
TI  - Results of spirit leveling in Ohio, 1911
T2  - U.S. Geological survey. Bulletin 518
AV  - QE75 .B9 no. 518
PY  - 1912///
CY  - Washington
PB  - Govt. Print. Off.
KW  - Ohio
KW  - Altitudes
N1  - Includes index
ER  -