15 books
Report on the geological Survey of the State of Iowa
Manual of Physical Geography and Institutions of the State of Iowa (Classic Reprint)
Smithsonian Institution. United States National Museum. the Relation of Biology to Geological Investigation, Pp. 247-368
A review of the non-marine fossil mollusca of North America
Bibliography of North American invertebrate paleontology
On the Relation of the Laramie Molluscan Fauna to That of the Succeeding Fresh-Water Eocene, and Other Groups
On Mesozoic Fossils
On Invertebrate Fossils from the Pacific Coast
On Marine Eocene, Fresh-Water Miocene, and Other Fossil Mollusca of Western North America
On the Mesozoic and Cenozoic Paleontology of California
The Texan Permian and Its Mesozoic Types of Fossils
A Review of the Fossil Ostreidae of North America and a Comparison of the Fossil with the Living Forms
Bulletin of the United States Geological Survey; No.15
United States Geological Survey Correlation Papers
Bioactive Carbohydrates