25 juin 2019
Richard C.P. Wilson, « Carson Quadrangle, Nevada. Looking west towards Mt. Rose. Timber over white area in photo center is Pinus ponderosa at Steamboat Springs on altered andesitic soil, dissimilar to large Jeffrey pine areas on slope beyond. Dark patch adjacent to and beyond Ponderosa area is heavy cover of Purshia tridentata », Berkeley Library Digital Collections, ID : 10670/1.c6wjvb