Feldman, S. B., L. W. Zelazny, and J. C. Baker. "High-Elevation Forest Soils of the Southern Appalachians:  I.  Distribution of Parent Materials and Soil-Landscape Relationships." Soil Science Society of America Journal 55, no. 6 (1991): 1629-1637.

Feldman, S. B., L. W. Zelazny, and J. C. Baker. "High-Elevation Forest Soils of the Southern Appalachians:  II. Geomorphology, Pedogenesis, and Clay Mineralogy." Soil Science Society of America Journal 55, no. 6 (1991): 1782-1791.