HD 4508 vol. 69-map detail.JPG | Newberry

Detail from: Sierraville Quadrangle, California, Showing Land Classificatoin and Density of Standing Timber, Plate IV accompanying John B. Lieberg, Professional Paper No. 8: Forest Conditions in the Northern Sierra Nevada, California (Washington: United States Geological Survey, 1902). Newberry Library call number: House Documents 4508 Volume 69.