https://openlibrary.org/books/OL4617081M/Lower_Cretaceous_Bullhead_and_Fort_St._John_Groups
Lower Cretaceous Bullhead and Fort St. John Groups by Donald F. Stott, 1968, Queen's Printer edition, in English
fort st johnlower cretaceousbullheadgroupsdonald
https://www.usgs.gov/publications/a-detailed-taxonomy-upper-cretaceous-and-lower-tertiary-crassatellidae-eastern-united
Current theories on the causes of extinction at the Cretaceous-Tertiary boundary have been based on previously published data; however, few workers have...
upper cretaceouslower tertiarydetailedtaxonomycrassatellidae