Monograph of the fossil Squalidae of the United States. Art. 14. Journal of the Academy of Natural Sciences of Philadelphia, 1(ser. 2), 191–206
Agriculture of the eastern counties, together with descriptions of the fossils of the marl beds. Report North Carolina Geol. Surv.: 1–314
The Vertebrata of the Cretaceous formations of the West. Report of the United States Geological Survey of the Territories, 2: 303 p., 67 pl.