TY  - RPRT
TI  - Nineteenth annual report of the United States Geological Survey to the Secretary of the Interior 1897 - 1898: Part I. Director's report, including triangulation and spirit leveling
AU  - Charles D. Walcott
PY  - 1898
DO  - 10.3133/ar19
UR  - https://pubs.usgs.gov/publication/ar19
ID  - ar19
ER  -