1. Cenozoic chronostratigraphy, planktonic foraminiferal zonation and the radiometric time scale;Berggren;Nature, Lond.,1969
2. Implications of the isotopic ages of ignimbrite flows, southern Atacama desert, Chile;Clark;Nature, Lond.,1967
3. Cobbing , E. J. 1972 Tectonic elements of Peru and the evolution of the Andes 24th Int. Geol. Congr. Montreal 3 306
4. Cobbing , E. J. 1973 Geología de los cuadrángulos de Barranca, Ambar, Oyon, Huacho, Huaral y Canta Boln. Serv. geol. min. Peru 26