Test of continental drift by comparison of radiometric ages - Hurley, Patrick M.; Almeida, Fernando Flávio Marques de; Melcher, Geraldo Conrado; Cordani, Umberto G.; Rand, J. R.; Kawashita, Koji; Vandoros, Paul; Pinson Jr, W. H.; Fairbairn, H. W. (Science, 1967)