@article {7692, title = {Black birch along Snake Den trail.}, year = {1940}, month = {September 29, 1940}, publisher = {Albert Gordon "Dutch" Roth Digital Photograph Collection}, type = {Photograph}, address = {The University of Tennessee Libraries Digital Collections}, abstract = {}, keywords = {Black birch, Snake Den Mountain, Trails}, url = {http://idserver.utk.edu/?id=200300000001956}, author = {Albert "Dutch" Gordon Roth} } @article {4692, title = {Trees Grow on Stilts in the Smokies}, journal = {The Science News-Letter}, volume = {28}, year = {1935}, month = {August 24}, pages = {125}, keywords = {Black birch, Trees}, author = {Anonymous} } @article {8476, title = {Spruce growing out of black birch}, year = {1920}, publisher = {Thompson Brothers Digital Photograph Collection}, address = {The University of Tennessee Libraries Digital Collections}, abstract = {}, keywords = {Black birch, Red spruce}, url = {http://idserver.utk.edu/?id=201000000000115}, author = {Thompson Brothers Commercial Photographers} }