Kolata, D. R., Strimple, H. L. & Levorson, C. O. 1977. A new species of Bothriocidaris (Echinoidea) from the Cincinnatian Maquoketa Group of Iowa. Proceedings of the Iowa Academy of Sciences 84, 146-149.
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Kolata, D. R.; Strimple, H. L.; Levorson, C. O.
1977
A new species of Bothriocidaris (Echinoidea) from the Cincinnatian Maquoketa Group of Iowa