TY  - RPRT
TI  - Nineteenth Annual Report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part VI - Mineral Resources of the United States, 1897, Metallic Products, Coal and Coke
AU  - Charles D. Walcott
PY  - 1898
DO  - 10.3133/ar19_6
UR  - https://pubs.usgs.gov/publication/ar19_6
ID  - ar19_6
ER  -