TY  - RPRT
TI  - Nineteenth Annual Report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part III - Economic Geology
AU  - Charles D. Walcott
PY  - 1899
DO  - 10.3133/ar19_3
UR  - https://pubs.usgs.gov/publication/ar19_3
ID  - ar19_3
ER  -