March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)
March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)
March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)
March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)
March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)
March 17, 1977: Opening of Rail Exhibition at Musuem of Natural History, Washington D.C., found in envelope mailed from the Smithsonian Institution Traveling Exhibition Service, Washington D.C. (no date)