TY  - RPRT
TI  - Natural gamma aeroradioactivity map of the Rockville quadrangle, Montgomery County, Maryland, and Fairfax County, Virginia
AU  - Jean Blanchett
AU  - Andrew Griscom
AU  - J. L. Vargo
PY  - 1966
DO  - 10.3133/gp565
UR  - https://pubs.usgs.gov/publication/gp565
ID  - gp565
ER  -