Author: GRIM (Ralpli Early)

Description

Grim (Ralpli Early). Petrograpbio and ceramic properties of Pennsylvanian shales of Illinois, !.!2.’ Urbana, 1944. See ILLINOIS, State of. Department of Registratd and Education. Division of the St,ate Geological Survey. tReport of Investigations, No. 72.]

Card ID: 10