TY  - RPRT
TI  - Lacustrine manganese; a supplement to U.S. Geological Survey Bulletin 1693
AU  - Keith R. Long
AU  - J. C. Wynn
AU  - F. Fritz
AU  - J. Corbett
PY  - 1992
DO  - 10.3133/ofr92239
UR  - https://pubs.usgs.gov/publication/ofr92239
ID  - ofr92239
ER  -