TY  - RPRT
TI  - Triangulation and primary traverse, 1913-1915; R.B. Marshall, Chief Geographer. Triangulation in Colorado, Utah, Idaho, Montana, and Wyoming, 1913-1915
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1916
DO  - 10.3133/b644d
UR  - https://pubs.usgs.gov/publication/b644D
ID  - b644D
ER  -