TY  - RPRT
TI  - Carbon isotopes in pelites of the Precambrian Uncompahgre Formation, Needle Mountains, Colorado
AU  - Fred Barker
AU  - Irving Friedman
PY  - 1969
DO  - 10.1130/0016-7606(1969)80[1403:ciipot]2.0.co;2
UR  - https://pubs.usgs.gov/publication/70223870
ID  - 70223870
ER  -