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[Collection of business correspondence of W. H. Schieffelin & Co., 170 and 172 William Street, New York]

[Collection of business correspondence of S. R. Van Duzer, wholesale druggist, New York]

[Collection of billheads of pharmaceutical firms and related businesses, United States, 1852-1878]

[Collection of billheads of pharmaceutical firms and related businesses, United States, 1886-1899]

[William H. Helfand graphic popular medicine stationery collection]

[Collection of billheads of pharmaceutical firms and related businesses, United States, 1852-1879]

[Collection of billheads of pharmaceutical firms and related businesses, United States and United Kingdom, 1880-1898]