@book {2820, title = {Appalachian Trail Data Book 1980}, series = {The Appalachian Trail Conference Publication}, year = {1980}, publisher = {The Appalachian Trail Conference}, organization = {The Appalachian Trail Conference}, edition = {2d ed.}, address = {Harpers Ferry, West Virginia}, keywords = {Appalachian Trail, Appalachian Trail -- History}, author = {The Appalachian Trail Conference, Inc.,} }