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Publications
1897
(en) Ulrich E.O. & Scofield W. H., 1897. The Lower Silurian Gastropoda of Minnesota. In: Ulrich E.O., Scofield W. H., Clarke J. M. & Winchell N. H. The Geological and Natural History Survey of Minnesota, volume 3(2), Harrison and Smith, Minneapolis, 48 plates. Pages 813-1081, plates 61-82.
1904
(en) Ulrich E.O. & Bassler R.S., 1904. Systematic paleontology of the Miocene deposits of Maryland. Maryland Geological Survey Miocene Reports.
(en) Ulrich E.O. & Bassler R.S., 1923. Paleozoic Ostracoda: their morphology, classification, and occurrence. Maryland Geological Survey, Silurian.
1926
(en) Ulrich E.O. & Bassler R.S., 1926. A classification of the toothlike fossils, conodonts, with descriptions of American Devonian and Mississippian species. Proc. U.S. Nat. Mus.