TY  - RPRT
TI  - Notes on the manganese ores of Brazil
AU  - C. F. Park
AU  - J. V. N. Dorr
AU  - P. W. Guild
AU  - A. L. M. Barbosa
PY  - 1951
DO  - 10.2113/gsecongeo.46.1.1
UR  - https://pubs.usgs.gov/publication/70207423
ID  - 70207423
ER  -