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Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Adirondack Survey, 1873, secondary reconnaisance sketch of Mount Marcy and of the most elevated lakelet or pond sources of the Hudson River" The New York Public Library Digital Collections. 1873. https://digitalcollections.nypl.org/items/7b4622f0-a28d-0133-fabb-00505686a51c
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. "Adirondack Survey, 1873, secondary reconnaisance sketch of Mount Marcy and of the most elevated lakelet or pond sources of the Hudson River" New York Public Library Digital Collections. Accessed March 16, 2025. https://digitalcollections.nypl.org/items/7b4622f0-a28d-0133-fabb-00505686a51c
Lionel Pincus and Princess Firyal Map Division, The New York Public Library. (1873). Adirondack Survey, 1873, secondary reconnaisance sketch of Mount Marcy and of the most elevated lakelet or pond sources of the Hudson River Retrieved from https://digitalcollections.nypl.org/items/7b4622f0-a28d-0133-fabb-00505686a51c
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/7b4622f0-a28d-0133-fabb-00505686a51c | title=
(cartographic)
Adirondack Survey, 1873, secondary reconnaisance sketch of Mount Marcy and of the most elevated lakelet or pond sources of the Hudson River, (1873)
|author=Digital Collections, The New York Public Library |accessdate=March 16, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>