1. 1 . Durance J Shamblin W: Appalachian Ways. The Appalachian Regional Commission 1976.
2. 2. Danish JJ. Smyer MA Nowack CA: Developmental intervention: Enhancing life - event processes in Baltes PB Brim OG Jr. (eds): Life Span Development and Aging. New York Academic Press 1980.
3. 3. Pastalan LA: Research in environment and aging: Alternative to theory in Lawton MP Windley PG Byers TO (eds): Aging and the Environment. New York Springer 1982.
4. 4. Simpkins ON: An informal incomplete introduction to Appalachian culture and how it got that way. Address at the Huntington Galleries Mountain Heritage Week; Huntington. W Va June 19-24 1972.
5. 5. Weller JE: Yesterday's People - Life in Contemporary Appalachia. Lexington KY University of Kentucky Press 1965.