TY  - RPRT
TI  - Geographic map of the Harper Quadrangle, Liberia
AU  - Members of the Engineering Geology and Ground Water Branches, U.S. Geological Survey
AU  - Liberian Geological Survey
PY  - 1973
DO  - 10.3133/i780a
UR  - https://pubs.usgs.gov/publication/i780A
ID  - i780A
ER  -