Latest Cretaceous mammals of upper part of Edmonton Formation of Alberta, Canada, and review of marsupial-placental dichotomy in mammalian evolution 

https://kuscholarworks.ku.edu/handle/1808/3825
Title: Latest Cretaceous mammals of upper part of Edmonton Formation of Alberta, Canada, and review of marsupial-placental dichotomy in mammalian evolution 
Author(s):
Jason A. Lillegraven
Paleo Publication Type:
KU Paleontological Contributions
Publication Format:
Journal article
Year of publication:
1969