TY  - RPRT
TI  - Geochemical Survey of Missouri: Plans and progress for fourth six-month period (January-June 1971)
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
PY  - 1971
DO  - 10.3133/ofr72401
UR  - https://pubs.usgs.gov/publication/ofr72401
ID  - ofr72401
ER  -