GEOMAP REGIONAL MAP NO 5 NORTH LOUISIANAWINNFIELD LA 15 MIN QUAD MAP USGSWATER QUALITY STATION MAP NO 15 OFFICE OF WATER DATACOORDINATION USGSMSHA METAL-NONMETAL MINE FILE REFERENCE 02/25/81GUIDEBOOK NORTH CENTRAL LOUISIANA SALT DOMES GULF COASTASSOCIATION OF GEOLOGICAL SOCIETIES 1970JOHN ROVIK PROFESSOR LSU GEOLOGY SCHOOL