TY  - RPRT
TI  - Possible Late Middle Ordovician organic carbon isotope excursion: Evidence from Ordovician oils and hydrocarbon source rocks, mid-continent and east-central United States
AU  - Joseph R. Hatch
AU  - Stephen R. Jacobson
AU  - Brian J. Witzke
AU  - J. Bruno Risatti
AU  - Donald E. Anders
AU  - W. Lynn Watney
AU  - K. David Newell
AU  - April K. Vuletich
PY  - 1987
DO  - 10.1306/703c8074-1707-11d7-8645000102c1865d
UR  - https://pubs.usgs.gov/publication/70014137
ID  - 70014137
ER  -