Leyden, D. R., & Hess, A. L. (1966). Personal income in West Virginia counties by type and magnitude, 1960-1963: A pilot study. Bureau of Business Research, College of Commerce and Office of Research and Development of the West Virginia Center for Appalachian Studies and Development, West Virginia University.

Leyden, Dennis R., and Albert Luther Hess. Personal Income in West Virginia Counties by Type and Magnitude, 1960-1963: A Pilot Study. [Morgantown]: Bureau of Business Research, College of Commerce and Office of Research and Development of the West Virginia Center for Appalachian Studies and Development, West Virginia University, 1966.

Leyden, Dennis R., and Albert Luther Hess. Personal Income in West Virginia Counties by Type and Magnitude, 1960-1963: A Pilot Study. Bureau of Business Research, College of Commerce and Office of Research and Development of the West Virginia Center for Appalachian Studies and Development, West Virginia University, 1966.