Paleozoic Plankton of North America

Geology and Paleontology of The Permian Area Northwest of Las Delicias, Southwestern Coahuila, Mexico

Tertiary Nautiloids of the Americas

Intertonguing Marine and Nonmarine Upper Cretaceous Deposits of New Mexico, Arizona, and Southwestern Colorado

Evolution of the Horse Brain

Propagation of Sound in the Ocean

Origin of granite

Mineralogical and Structural Evolution of the Metamorphic Rocks

Stratigraphy and Fauna of the Agua Salada Group, State of Falcón, Venezuela

Geology and Origin of South Park, Colorado

Permian Crinoid Calceolispongia

Geology of the Lake Titicaca Region, Peru and Bolivia

Bibliography of Fossil Vertebrates

Lower Cretaceous Stratigraphy in Southeastern Arizona

Sedimentary facies in geologic history: conference at meeting of the Geological Society of America held in New York, New York, November 11, 1948

Revision of the Families and Genera of the Devonian Tetracorals

American Permian Nautiloids

Maquoketa Brachiopoda of Iowa