Johnson, Kristine D., Fred P. Hain, Katherine S. Johnson, and Felton Hastings. Hemlock Resources at Risk in the Great Smoky Mountains National Park In Proceedings of the Symposium on Sustainable Management of Hemlock Ecosystems in Eastern North America. Newtown Square, PA: U.S. Department of Agriculture, 1999.

Johnson, Katherine S.. Eastern Hemlock Forest Delineation in Great Smoky Mountains National Park (1993-1995). Gatlinburg, TN: Resources Management and Science Division, Great Smoky Mountain National Park, 1995.

Yost, Edward C., Katherine S. Johnson, and William F. Blozan. Old Growth Project: Stand Delineation and Disturbance Rating Great Smoky Mountains National Park In Technical Report NPS/ SERGRSM/ NRTR. Gatlinburg, TN: National Park Service, 1994.