Geology of Nimba County, Liberia /
Force, Eric R.
Liberian Geological Survey.
United States.Agency for International Development.
Washington : U.S. G.P.O.,
1983.
"Prepared in cooperation with the Liberian Geological Survey under the auspices of the Government of Liberia and the Agency for International Development, U.S. Department of State.".
Bibliography: p. 25-27
Geology