25 juin 2019
Albert Everett Wieslander, « Three-quarters mile W. of Nevada City. Hardwood-conifer mixture dense trees; Conifers, open density and all young growth. Species; Quercus kelloggii, Pinus ponderosa, Pseudotsuga taxifolia, all young growth. Nevada County. », Berkeley Library Digital Collections, ID : 10670/1.0ahpci