TY  - RPRT
TI  - Minor-element composition and organic carbon content of marine and nonmarine shales of Late Cretaceous age in the western interior of the United States
AU  - H. A. Tourtelot
PY  - 1964
DO  - 10.1016/0016-7037(64)90008-0
UR  - https://pubs.usgs.gov/publication/70010464
ID  - 70010464
ER  -