TY  - RPRT
TI  - Total-count gamma radiation map of the Bopolu quadrangle, Liberia
AU  - John Charles Behrendt
AU  - Cletus S. Wotorson
PY  - 1971
DO  - 10.3133/ofr7129
UR  - https://pubs.usgs.gov/publication/ofr7129
ID  - ofr7129
ER  -