Pliocene mollusca from a coral limestone of a hill near Sekoerau, E. Borneo - 1950
The Paleocene pollen flora of Colombia - 1966
The Portilla Formation (Middle Devonian) of the Alba Syncline, Cantabrian Mountains, Providence Leon, Northwest Spain: Carbonate facies and Rhynchonellid paleontology - 1972
Facies and diagenesis of the Devonian Portilla Limestone Formation between the River Esla and the embalse de la Luna, Cantabrian Mountains, Spain - 1972