Author:

Tschudy,R.H.;Loenen,S.D.Van

Year:

1966

Title:

Plant microfossils from the Lakota Formation.

Reference:

Tschudy,R.H. et al. (1966) Plant microfossils from the Lakota Formation. United States Geological Survey, Open-File Report Vol. 66 # 843 P. 1- 2

Google Academy:

try to search by title in english