Whitney, M. I. & Kellum, L. B. 1966. Echinoids of the Glen Rose Limestone of Texas. Papers of the Michigan Aademy of Sciences, Arts and Letters 51, 241-263.
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Whitney, M. I.; Kellum, L. B.
1966
Echinoids of the Glen Rose Limestone of Texas
Papers of the Michigan Aademy of Sciences, Arts and Letters