Wad from Coconino County, Arizona, USA
USA | |
| Anthony, John W., Williams, Sidney A., Bideaux, Richard A., Grant, Raymond W. (1995) Mineralogy of Arizona (3rd ed.) University of Arizona Press, Tucson, AZ. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 416 Galbraith, F.W. & D.J. Brennan (1959), Minerals of AZ: 31. |
| Anthony, J.W., et al (1995), Mineralogy of Arizona, 3rd.ed.: 416 Farnham, L.L. & L.A. Stewart (1958) Manganese deposits of western Arizona, US Bur. of Mines Info. Circ.: 7843. |