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The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "The gravity of soap oil is determined. Soap oil is obtained by extraction with a solvent from the cake which remains after the first 2 pressings. 1/3 of our total consumption of fats/ oils is for non-food. 18% of this non-food uses of oil is for soap" The New York Public Library Digital Collections. 1942. https://qa-digitalcollections.nypl.org/items/58b93b90-9a86-0137-83b7-5134be8ca3cd
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. "The gravity of soap oil is determined. Soap oil is obtained by extraction with a solvent from the cake which remains after the first 2 pressings. 1/3 of our total consumption of fats/ oils is for non-food. 18% of this non-food uses of oil is for soap" New York Public Library Digital Collections. Accessed November 23, 2024. https://qa-digitalcollections.nypl.org/items/58b93b90-9a86-0137-83b7-5134be8ca3cd
The Miriam and Ira D. Wallach Division of Art, Prints and Photographs: Photography Collection, The New York Public Library. (1942). The gravity of soap oil is determined. Soap oil is obtained by extraction with a solvent from the cake which remains after the first 2 pressings. 1/3 of our total consumption of fats/ oils is for non-food. 18% of this non-food uses of oil is for soap Retrieved from https://qa-digitalcollections.nypl.org/items/58b93b90-9a86-0137-83b7-5134be8ca3cd
<ref name=NYPL>{{cite web | url=https://qa-digitalcollections.nypl.org/items/58b93b90-9a86-0137-83b7-5134be8ca3cd | title=
(still image)
The gravity of soap oil is determined. Soap oil is obtained by extraction with a solvent from the cake which remains after the first 2 pressings. 1/3 of our total consumption of fats/ oils is for non-food. 18% of this non-food uses of oil is for soap, (1942)|author=Digital Collections, The New York Public Library |accessdate=November 23, 2024 |publisher=The New York Public Library, Astor, Lenox, and Tilden Foundations}}</ref>