You searched for: Date Created 1939 Remove constraint Date Created: 1939 Holding Location B-WELLS Remove constraint Holding Location: B-WELLS Provenance Part of Geological Survey (U.S.). Indiana 1:62,500. Remove constraint Provenance: Part of Geological Survey (U.S.). Indiana 1:62,500. Subject Geographic Subject: Iroquois County (Ill.) Remove constraint Subject: Geographic Subject: Iroquois County (Ill.)