Author:

Tschudy,B.D.

Year:

1973

Title:

Palynology of the Upper Campanian, (Cretaceous) Judith River Formation, north-central Montana.

Reference:

Tschudy,B.D. (1973) Palynology of the Upper Campanian, (Cretaceous) Judith River Formation, north-central Montana. United States Geological Survey, Professional Paper # 770 P. 1- 42

Google Academy:

try to search by title in english