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[T. A. Conrad. 1838. Observations on characteristic fossils, and upon a fall of temperature in different geological epochs. American journal of science and art, 35: 237-249.]
[T. A. Conrad. 1839. On the silurian system, with a table of the strata and characteristic fossils; Observations on the genus Gnathodon, with description of new species. American journal of science and art, 38: 86-93.]
[T. A. Conrad. 1840. On the geonostic position of the Zeuglodon, or Basilosaurus of Harlan. American journal of science and art, 38: 381-382.] |
