@book {2821, title = {Appalachian Trail Data Book 1989}, series = {The Appalachian Trail Conference Publication}, year = {1989}, publisher = {The Appalachian Trail Conference}, organization = {The Appalachian Trail Conference}, edition = {11th}, address = {Harpers Ferry}, keywords = {Appalachian Trail, Appalachian Trail -- History}, author = {The Appalachian Trail Conference, Inc.,} }