	Authors	Year	Title
	Conrad	1838	Report on the palaeontological department of the Survey [of New York]. New York Geological Survey, Annual Report 2: 107-119.
	Conrad	1842	Observations on the Silurian and Devonian systems of the United States, with descriptions of new organic remains. Journal of the Academy of Natural Sciences of Philadelphia, 8: 228-280, pl.12-18, Philadelphia.