TY  - RPRT
TI  - Additional Field Methods Used in Geochemical Prospecting by the U.S. Geological Survey
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1953
DO  - 10.3133/ofr53278
UR  - https://pubs.usgs.gov/publication/ofr53278
ID  - ofr53278
ER  -