TY  - BOOK
AU  - Martin,Helen M.
ED  - Michigan.
TI  - Outline of the geologic history of Hillsdale County,
AV  - QE126.H5 M3
PY  - 1957///]
CY  - [Lansing
PB  - Michigan Dept. of Conservation, Geological Survey Division
KW  - Geology
KW  - Michigan
KW  - Hillsdale County
ER  -