TY  - RPRT
TI  - Map of geologic sources of radioactivity in the United States
AU  - Mary E. Strobell
AU  - Helen L. Cannon
PY  - 1975
DO  - 10.3133/ofr75270
UR  - https://pubs.usgs.gov/publication/ofr75270
ID  - ofr75270
ER  -