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Altman, Benjamin, 1840-1913 -- Art collections. / https://id.loc.gov/authorities/names/nr97023984 https://id.loc.gov/authorities/subjects/sh99002459 : Metropolitan Museum of Art (New York, N.Y.)
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Altman, Benjamin, 1840-1913 -- Art collections -- Catalogs. / https://id.loc.gov/authorities/names/nr97023984 https://id.loc.gov/authorities/subjects/sh99002459 https://id.loc.gov/authorities/subjects/sh99001246 : Metropolitan Museum of Art (New York, N.Y.)