Stratigraphy of the Cretaceous-Tertiary boundary in the Southern Raton Basin, New Mexico and Colorado.
Reference:
Pillmore,C.L. et al. (1983)
Stratigraphy of the Cretaceous-Tertiary boundary in the Southern Raton Basin, New Mexico and Colorado. Geological Society of America, Abstracts with Program, Annual Meeting
Vol. 15 # 5 P. 308- 308