TY  - RPRT
TI  - Colorado geology then and now: Following the route of the Colorado Scientific Society’s 1901 trip through central Colorado
AU  - Beth Simmons
PY  - 2013
DO  - 10.1130/2013.0033(02)
UR  - https://pubs.usgs.gov/publication/70047112
ID  - 70047112
ER  -