Geology of the Ciales quadrangle, Puerto Rico - Berryhill, Henry L. (Henry Lee), 1921- (Washington, U.S. Govt. Print. Off., 1965)
Part of illustrative matter fold. in pocket.
Prepared in cooperation with the Commonwealth of Puerto Rico Economic Development Administration, Industrial Research Department.
Bibliography: p. 111-112.
Keywords: Geology -- Puerto Rico -- Ciales quadrangle