McColloch, M. E.; Gilmour, E. H.; Snyder, E. M. (1994). The Order Fenestrata (Bryozoa) of the Toroweap Formation (Permian). Journal of Paleontology, 68: 746-762
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McColloch, M. E.; Gilmour, E. H.; Snyder, E. M.
1994
The Order Fenestrata (Bryozoa) of the Toroweap Formation (Permian)