| Reference | ANNUAL REPORT OF THE GEOLOGICAL SURVEY OF ARKANSAS FOR 1892 (PUB. DEC, 1900) VOL V: THE ZN AND PB REGION OF NORTH ARK., BY STATE GEOLOGIST JOHN C. BRANNER, P. 97 USGS RESTON (241) AR5 (ON YELLVILLE SHEET IN THIS BOOK, THOUGH NOT SPECIFIED BY A SYMBOL |