TY  - RPRT
TI  - Field guide to the continental Cretaceous-Tertiary boundary in the Raton basin, Colorado and New Mexico
AU  - C. L. Pillmore
AU  - D. J. Nichols
AU  - Fleming
PY  - 1999
DO  - 10.1130/0-8137-0001-9.135
UR  - https://pubs.usgs.gov/publication/70045672
ID  - 70045672
ER  -