TI - A geochronological comparison of West African and South American basements PY - 1972 AU - Melcher, Geraldo Conrado AU - Cordani, Umberto G. AU - Isotta, Carlos Augusto Luciano AU - Hurley, P M T2 - Continental Drift Emphasizing the History of the South Atlantic Area J2 - Eos (Washington) PP - Washington PB - The Union VL - 53 IS - 2 SP - 178 ER -