TY - RPRT TI - Distribution of oxygen and carbon isotopes in fossils of late cretaceous age, western interior region of North America AU - H. A. Tourtelot AU - R.O. Rye PY - 1969 DO - 10.1130/0016-7606(1969)80[1903:dooaci]2.0.co;2 UR - https://pubs.usgs.gov/publication/70207123 ID - 70207123 ER -