TY  - RPRT
TI  - Aeroradioactivity map of the Chicago area, Illinois and Indiana
AU  - G.M. Flint
AU  - J. A. Pitkin
PY  - 1970
DO  - 10.3133/gp681
UR  - https://pubs.usgs.gov/publication/gp681
ID  - gp681
ER  -