TY  - RPRT
TI  - Aeromagnetic map of the Bopolu quadrangle, Liberia
AU  - John Charles Behrendt
AU  - Cletus B. Wotorson
PY  - 1971
DO  - 10.3133/ofr7120
UR  - https://pubs.usgs.gov/publication/ofr7120
ID  - ofr7120
ER  -