Upper Cretaceous floras of the Rocky Mountain region /
by Erling Dorf.
APA Citation
Dorf, E. (18381942). Upper Cretaceous floras of the Rocky Mountain region. Washington : Carnegie Institute of Washington.
MLA Citation
Dorf, Erling, 1905-1984. Upper Cretaceous Floras of the Rocky Mountain Region. Washington : Carnegie Institute of Washington, 18381942.
Warning: These citations may not always be complete (especially for serials).