electrical porcelain (Industrial Directory 1927)
Fitzgerald, Thomas F. 1927-1928. “Fitzgerald’s Trenton and Mercer County Directory, Together with a Directory of Bordentown, Burlington, Mount Holly and Lambertville, NJ.” Thomas F. Fitzgerald, Trenton, New Jersey.
New Jersey Bureau of Statistics and Records, Department of Labor. 1927. “The Industrial Directory of New Jersey.” Trenton, New Jersey.