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Laurence, Robert A.. "An Early Ordovician Sinkhole Deposit of Volcanic Ash and Fossiliferous Sediments in East Tennessee." The Journal of Geology 52, no. 4 (1944): 235-249.
Laurence, Robert A., and A. R. Palmer. "Age of the Murray Shale and Hesse Quartzite on Chilhowee Mountain, Blount County, Tennessee." In Short Paper in Geology and Hydrology Aricles 60-121, C53-C54. Geological Survey Professional Paper 475-C. Wasington, D.C.: U.S. Government Printing Office, 1963.