Author: SIEVR (Raynond)

Description

L j Sievr (Raynond). The Mi ssi ssippian-?ennaylvanian unconformity in Southern Illinois, etc. Urbana, 1951. See ILLINOIS, of. epartment of Registrati and Eucat. ivisI 01’ thStat’ Geoloca1Srve3&t o1’ IñveIjons.’j 152.

Card ID: 558