Saya mau tau Rujukan dari Union Pacific Railroad. Jelaskan dalam bahasa melayu

– covers impact of the railroad on the region it served from the 1860s to the 1890s.

– the standard scholarly history

illustrated account of the Union Pacific and other North American Railroads

Photographs of the Construction of the Union Pacific Railroad, 1868–69 at the Beinecke Rare Book and Manuscript Library at Yale University

Thousands of photographs from as early as 1860 taken by employees of the Union Pacific railroad