Columbia subject headings:
Harvard subject headings:
Industries--Connecticut--History--Sources--Catalogs.
Labor unions--Connecticut--History--Sources--Catalogs.
Technological innovations--Connecticut--History--Sources--Catalogs.
Working class--Connecticut--Interviews--Catalogs.
Princeton subject headings:
Labor--Connecticut--Interviews--Indexes.
Technological innovations--Social aspects--Connecticut--Indexes.
Worker and technological change, 1930-1980--Indexes.