TY  - BOOK
AU  - Calvert,William R.
TI  - Geology of the Lewistown coal field, Montana
T2  - United States.  Geological Survey.  Bulletin
AV  - TN805.M9 C2
PY  - 1909///
CY  - Washington
PB  - Government Printing Office
KW  - Geology
KW  - Montana
KW  - Coal
ER  -