West Bijou Site Cretaceous-Tertiary boundary, Denver Basin, ColoradoDOI: info:10.1130/0-8137-0005-1.59v. 5Geological Society of America59–68
Barclay, Richard S. and Johnson, Kirk R. 2004. "West Bijou Site Cretaceous-Tertiary boundary, Denver Basin, Colorado." In Field Trips in the Southern Rocky Mountains, USA ; GSA Field Guide 5:. 59–68. Geological Society of America. 5 https://doi.org/10.1130/0-8137-0005-1.59.