TY  - RPRT
TI  - Geologic map of the Harper Quadrangle, Liberia
AU  - M. R. Brock
AU  - A.H. Chidester
AU  - M.W.G. Baker
PY  - 1977
DO  - 10.3133/i780d
UR  - https://pubs.usgs.gov/publication/i780D
ID  - i780D
ER  -