↑ Balkwill, Richard; Marshall, John (1993). The Guinness Book of Railway Facts and Feats (6thed.). Enfield: Guinness Publishing. ISBN0-85112-707-X.
↑ Crittenden, H. Temple (1966). The Maine Scenic Route. McClain Printing Company. p.183.
↑ "Obituary: Charles Sanger Mellen". New York Times. November 18, 1927. p.23.
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