25 juin 2019
Albert Everett Wieslander, « Snowden Hill ridge ( looking S from). Young-old growth conifer mixtures. Not even mosaic, but mixed by tree groups. Species: Pinus ponderosa, Pseudotsuga taxifolia, Abies concolor, Quercus kelloggii, Arbutus menziesii, Lithocarpus densiflora. (Air photo 3-35) », Berkeley Library Digital Collections, ID : 10670/1.84ojm8