Adams

FRANKEL, J.J., 1958, MANGANESE ORES FROM THE KURUMAN DISTRICPROVINCE, SOUTH AFRICA: ECON. GEAL. V.53, P. 577-597.PELLETIER,R&A., 1964, MINERAL RESOURCES OF SOUTH-CENTRAL AFROXFORD UNIV. PRESS, LONDON, P.98.BOARDMAN, L.G., 1964, FURTHER GEOLOGICAL DATA ON THE POSTMASAND KURUMAN MANGANESE ORE DEPOSITS, NORTHERN CAPE PROVITHE GEOL. OF SOME ORE DEP. IN SOUTHERN AFRICA, V.II: GES.A., P. 415-440.DE VILLIERS, JOHN, 1960, THE MANGANESE DEPOSITS OF THE UNIONSOUTH AFRICA: GEOLOGICAL SURVEY OF SOUTH AFRICA, 248P.