Nota de fuente |
The Coffin Islands, 1854---(Surveyed by order of Commodore M.C. Perry U.S.N. by Lieuts. G.B. Balch, G.M. Cooper and L.A. Beardslee Mid. of the U.S. Ship Plymouth, Commander John Kelly U.S.N. 1854 ; Engraved by Siebert)
Tooley's Dictionary of Mapmakers, 1999---T. I pág. 75( Balch, Lieutenant Colonel George Thatcher (1824-1894))
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