3, p. 421-432* Bucher, W. H., Caster, K. E. and Jones, S. M., "Elementary guide to the fossils and strata in the vicinity of Cincinnati", 1945, Cincinnati Museum of Natural History.
3, p. 421-432* Bucher, W. H., Caster, K. E. and Jones, S. M., «Elementary guide to the fossils and strata in the vicinity of Cincinnati», 1945, Cincinnati Museum of Natural History.