TY  - RPRT
TI  - Geology of the western part of the Harold D. Roberts Tunnel, Colorado (Stations 0+00 to 690+00)
AU  - Ernest Eugene Wahlstrom
AU  - Charles Sherwood Robinson
AU  - V. Quentin Hornback
PY  - 1981
DO  - 10.3133/pp831c
UR  - https://pubs.usgs.gov/publication/pp831C
ID  - pp831C
ER  -