Bratton, Susan Power, Matthew G. Hickler, and James H. Graves. "Trail Erosion Patterns in Great Smoky Mountains National Park." Environmental Management 3, no. 5 (1979): 431-445.

Bratton, Susan Power, Matthew G. Hickler, and James H. Graves. "Visitor Impact on Backcountry Campsites in the Great Smoky Mountains." Environmental Management 2, no. 5 (1978): 431-442.

Bratton, Susan Power, Matthew G. Hickler, and James H. Graves. Trail and Campsite Erosion Survey for Great Smoky Mountains National Park: Part II. Patterns of Overnight Backcountry Use and the Condition of Campsites In Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory , 1977.

Bratton, Susan Power, Matthew G. Hickler, and James H. Graves. Trail and Campsite Erosion Survey for Great Smoky Mountains National Park Part VI: The Description of Individual Trails In Research/resources Management Report; no. 16.  Gatlinburg, Tenn.: Uplands Field Research Laboratory, Great Smoky Mountains National Park , 1977.

Bratton, Susan Power, Matthew G. Hickler, and James H. Graves. Trail and Campsite Erosion Survey for Great Smoky Mountains National Park: Part IV. The Description of Individual Trails In Research/Resources Management Report. Gatlinburg, TN: Uplands Field Research Laboratory , 1977.