Columbia subject headings:
Harvard subject headings:
Hagley Museum and Library--Photograph collections--Catalogs.
Iron industry and trade--United States--History--Sources--Catalogs.
Photograph collections--Delaware--Wilmington--Catalogs.
Steel industry and trade--United States--History--Sources--Catalogs.
Princeton subject headings:
Hagley Museum and Library--Photograph collections--Catalogs.
Iron industry and trade--United States--History--Sources--Catalogs.
Photograph collections--Delaware--Wilmington--Catalogs.
Steel industry and trade--United States--History--Sources--Catalogs.