TY  - BOOK
AU  - Warner,Lawrence Allen
AU  - Robinson,Charles Sherwood
TI  - Geology of the eastern part of the Harold D. Roberts Tunnel, Colorado (Stations 690+00 to 1238+58)
T2  - Geological Survey professional paper
U1  - 624.192 
PY  - 1981///
CY  - Washington
PB  - U.S. Govt. Print. Off.
KW  - Engineering geology
KW  - Colorado
KW  - Harold D. Roberts Tunnel
KW  - Geology
N1  - Bibliography: p. 31
ER  -