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Spencer Collection, The New York Public Library. "Constructions of polygons within a circle" The New York Public Library Digital Collections. 1550. https://digitalcollections.nypl.org/items/6d972a7d-a0c8-0241-e040-e00a1806703f
Spencer Collection, The New York Public Library. "Constructions of polygons within a circle" New York Public Library Digital Collections. Accessed March 8, 2021. https://digitalcollections.nypl.org/items/6d972a7d-a0c8-0241-e040-e00a1806703f
Spencer Collection, The New York Public Library. (1550). Constructions of polygons within a circle Retrieved from https://digitalcollections.nypl.org/items/6d972a7d-a0c8-0241-e040-e00a1806703f
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Constructions of polygons within a circle, (1550)
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