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Filters: First Letter Of Title is A and Author is Humphries, George  [Clear All Filters]
2006
Humphries, George. Air Quality In Great Smoky Mountains National Park management folio. rev. ed. Great Smoky Mountains Association, 2006.
1997
Humphries, George, Harley E. Jolley, and Dan J. Pittillo. Along the Blue Ridge Parkway. Englewood, CO: Westcliffe Publishers, 1997.