Gilmour, E. H.; McColloch, M. E. (1995). Fenestrida and Rhabdomesida (Bryozoa) of the Otter Formation (Visean), Central Montana. Journal of Paleontology, 69: 813-830
372829
Gilmour, E. H.; McColloch, M. E.
1995
Fenestrida and Rhabdomesida (Bryozoa) of the Otter Formation (Visean), Central Montana