Columbia subject headings:
Harvard subject headings:
Geology, Stratigraphic--Cretaceous--Congresses
Geology--Canada, Western--Congresses.
Ichnology--Congresses.
Ichnology.
Petroleum--Prospecting
Petroleum--Prospecting--Congresses
Princeton subject headings:
Ichnology--Congresses.
Petroleum--Prospecting--Congresses.
Sedimentation and deposition--Congresses.