https://digitalcommons.usf.edu/nab/vol54/iss2/12/
"Appalachia" by Robert C. Leberman
By Robert C. Leberman, Published on 06/01/00
by robertappalachia
https://digitalcommons.usf.edu/nab/vol57/iss4/12/
"Eastern Highlands and Upper Ohio River Valley" by Robert C. Leberman
By Robert C. Leberman, Published on 12/01/04
ohio river valleyeastern highlandsby robertupper