TY  - RPRT
TI  - Twentieth Annual report of the United States Geological Survey, 1898-1899: Part II - General geology and paleontology
AU  - Charles D. Walcott
PY  - 1900
DO  - 10.3133/ar20_2
UR  - https://pubs.usgs.gov/publication/ar20_2
ID  - ar20_2
ER  -