Author:

Peppers,R.A.;Pfefferkorn,H.W.

Year:

1970

Title:

A comparison of the floras of the Colchester (No.2) Coal and Francis Creek Shale. (In: Depositional environments in parts of the Carbondale Formation: Western and northern Illinois)

Reference:

Peppers,R.A. et al. (1970) A comparison of the floras of the Colchester (No.2) Coal and Francis Creek Shale. (In: Depositional environments in parts of the Carbondale Formation: Western and northern Illinois) Illinois State Geological Survey, Guidebook Series # 8 P. 61- 74

Google Academy:

try to search by title in english