You searched for: 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: Gibson County (Ind.) Remove constraint Subject: Geographic Subject: Gibson County (Ind.) Subject Geographic Subject: Wabash County (Ill.) Remove constraint Subject: Geographic Subject: Wabash County (Ill.) Subject Topical Subject: Vegetation mapping Remove constraint Subject: Topical Subject: Vegetation mapping