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Hoffman, Richard L.. "Records and Descriptions of Diplopods from the Southern Appalachians." Journal of the Elisha Mitchell Scientific Society 66, no. 1 (1950): 11-33.
Barr, Thomas G., Perry C. Holt, Bruce C. Parker, Richard L. Hoffman, and C. W. Hart. "Evolution of the (Coleoptera) Carabidae in the Southern Appalachians." In The Distributional History of the Biota of the Southern Appalachians. Part I: Invertebrates, 67-92. Virginia Polytechnic Institute and State University. Research Division. Monographs. Blacksburg, VA: Virginia Polytechnic Institute, 1969.