References
SHEAD, A.C., 1929, OGS BULLETIN 14, P. 6, 10, 27, 29, 31, 83, 87, 91.FISCHER, R.P., 1937, ECONOMIC GEOLOGY, V. 32, P. 906-951 (P. 921).MERRITT, C.A., 1940, OGS MINERAL REPORT #8, P. 10-12.BRANSON, C.C., BURWELL, A.L., AND CHASE, G.C., 1955, OGS MINERAL REPORT 27, 22 P. (P. 15-17).RIES, E.R., 1955, OGS BULLETIN 71, 120 P.DOTT, R.H., 1946, 1947, 1948, OGS FILE, LETTERS, 12 P., OKFUSKEE CO., OKLA.MERRITT, C.A., AND HAM, W.E., JUNE 1940, OGS FILE, SHEET 347, OKFUSKEE CO., OKLA.ROY ELLIS OF PRAGUE, GRANDSON OF JOHN GRAVITT, SINCE 1950 HAS TAKEN CARE OF THE PROPERTY FOR THE GRAVITT ESTATE, P.O. BOX 815, PRAGUE (ELLIS COURTS), LINCOLN COUNTY, OKLA.MERRITT, C.A., HAM, W.E., AND JEFFERS, L., JUNE 1940, OGS FILE, SHEET 348, OKFUSKEE CO., OKLA., 5 P.JEFFERS, LESTER, 1937, OGS FILE, SHEET 5607, OKFUSKEE CO., OKLA.SHEAD, A.C., 1929, P. 6, 10, 27, 29, 31, 83, 87, 91. MERRITT, C.A., 1940, P. 12