1. Avary, K.L., and J.M. Dennison. 1980. Back Creek Siltstone Member of Devonian Brallier Formation in Virginia and West Virginia. Southeastern Geology 21: 121–153.
2. Bell, S.C., and R. Smosna. 1999. Regional facies analysis and carbonate ramp development in the Tonoloway Limestone (U. Silurian; Central Appalachians). Southeastern Geology 38(4): 259–278.
3. Bick, K.F. 1962. Geology of the Williamsville quadrangle. Virginia Division of Mineral Resources Report of Investigations 2: 40 pp.
4. Bowen, Z.P. 1967. Brachiopoda of the Keyser Limestone (Silurian—Devonian) of Maryland and adjacent areas. Geological Society of America Memoir 102: 103 pp.
5. Butts, C. 1933. Geologic map of the Appalachian Valley in Virginia with explanatory text. Virginia Geological Survey Bulletin 42: 56 pp.