Northern Pacific Railroad Company & Rand McNally and Company. (1879). Map of the Northern Pacific Railroad and connections. Northern Pacific Railroad.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNorthern Pacific Railroad Company और Rand McNally and Company. Map of the Northern Pacific Railroad and Connections. [St. Paul, Minn.]: Northern Pacific Railroad, 1879.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNorthern Pacific Railroad Company और Rand McNally and Company. Map of the Northern Pacific Railroad and Connections. Northern Pacific Railroad, 1879.
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