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Stereoscopic views of Pittsburgh, Pennsylvania and vicinity.
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Front view of ladle emptying molten iron into moulds, pig iron machine, Pittsburg, Pa., U.S.A." The New York Public Library Digital Collections. 1886 - 1915. https://digitalcollections.nypl.org/items/510d47e0-a6f2-a3d9-e040-e00a18064a99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "Front view of ladle emptying molten iron into moulds, pig iron machine, Pittsburg, Pa., U.S.A." New York Public Library Digital Collections. Accessed January 17, 2025. https://digitalcollections.nypl.org/items/510d47e0-a6f2-a3d9-e040-e00a18064a99
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1886 - 1915). Front view of ladle emptying molten iron into moulds, pig iron machine, Pittsburg, Pa., U.S.A. Retrieved from https://digitalcollections.nypl.org/items/510d47e0-a6f2-a3d9-e040-e00a18064a99
<ref name=NYPL>{{cite web | url=https://digitalcollections.nypl.org/items/510d47e0-a6f2-a3d9-e040-e00a18064a99 | title=
(still image)
Front view of ladle emptying molten iron into moulds, pig iron machine, Pittsburg, Pa., U.S.A., (1886 - 1915)|author=Digital Collections, The New York Public Library |accessdate=January 17, 2025 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>