TY  - RPRT
TI  - Geology of the eastern part of the Harold D. Roberts Tunnel, Colorado (Stations 690+00 to 1238+58)
AU  - Lawrence Allen Warner
AU  - Charles Sherwood Robinson
PY  - 1981
DO  - 10.3133/pp831d
UR  - https://pubs.usgs.gov/publication/pp831D
ID  - pp831D
ER  -