Contributions to the Eocene fauna of the middle Atlantic slope. Johns Hopkins University Circulars, 15 (121): 3–6
The Eocene deposits of the Middle Atlantic slope in Delaware, Maryland, and Virginia. Bulletin of the United States Geological Survey, 141: 1–167, pl. 1–8.
Bibliography and catalogue of the fossil Vertebrata of North America. Bulletin of the United States Geological and Geographical Survey of the Territories, 179: 1–868
Generic Assessment and Reallocation of Cenozoic Myliobatinae based on new information of tooth, tooth plate and caudal spine morphology of extant taxa. Palaeontos, 24, 1–66, 3 text–figs, 51 Plates