TY  - RPRT
TI  - Natural gamma aeroradioactivity map of the Gaithersburg and part of the Sandy Spring quadrangles, Montgomery County, Maryland
AU  - Jean Blanchett
AU  - Andrew Griscom
AU  - F. C. Smith
PY  - 1966
DO  - 10.3133/gp566
UR  - https://pubs.usgs.gov/publication/gp566
ID  - gp566
ER  -