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Division of Work and Industry Lantern Slide Collection
S. Morgan Smith Company Records
Delaware, Lackawanna and Western Railroad Records
Providence Engineering Works Records
Erie City Iron Works Collection
Food Preservation and Home Canning Literature
Berlin Construction Company Records
Richard Fisher Panama Canal Collection
David Plowden North American Bridge Photographs
Quebec Bridge Photograph Collection
Raymond E. Wilson Covered Bridge Collection
John A. Roebling Collection
Emmet Mercury Boiler Records
Erasmus D. Leavitt Papers
Henry Grattan Tyrrell and Mary Maude Knox Tyrrell Papers