Black Negro

{Deposit:: Libbey, F. W., Et. Al., 1942 , Manganese In Oregon: ODGMI Bulletin 17 , P. 50}{Deposit:: Oregon Metal Mines Handbook, 1939 , ODGMI Bulletin 14 - A, P. 71 .}{Deposit:: Brooks, H.C., Mcintyre, J.R., And Walker, G.W., 1976 Geologic Map Of The Oregon Part Of The Baker 1deg By 2deg Quadrangle, ODGMI GMS-7, Geol. Map}{Deposit:: U.S. Geological Survey Bulletin 725-C, 1921, P. 224.}{Deposit:: U.S. Bureau Of Mines Report of Investigation 5472, 1959, P. 6-7.}