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

Stratigraphy of Western Newfoundland

Devonian Ammonoids of America

Permian Ammonoids of the Guadalupe Mountain Region and Adjacent Areas

Bibliographic Index of North American Devonian Cephalopoda

Ozarkian and Canadian Cephalopods: Part II: Brevicones

Interpretation of Aeromagnetic Maps

North American Geosynclines

Geologic Structure and Orogenic History of Venezuela

Deformation, Metamorphism, and Mineralization in Gypsum-Anhydrite Cap Rock Sulphur Salt Dome, Louisiana

Selected Petrogenic Relationships of Plagioclase

Paleozoic and Mesozoic Arachnida of Europe

Trilobites from the Lower Champlainian Formations of the Appalachian Valley

North American and European Stropheodontids: Their Morphology and Systematics

Upper Paleozoic of Peru

Silicified Middle Ordovician Trilobites

Stratigraphy and History of the Moenkopi Formation of Triassic Age

Ordovician Cephalopod Fauna of Baffin Island

Paleozoic and Mesozoic Rocks of Gros Ventre, Teton, Hoback, and Snake River Ranges, Wyoming

Sunken Islands of the Mid-Pacific Mountains