An Electric Day, page 619, [magazine article]
There's only one Teflon. And now it's improved. [color advertisement; tear sheet].
"Training Outline: Farm, Home and School Lighting" (Annotated Copies)
William J. Hammer Collection
George H. Clark Radioana Collection
Charles R. Pratt (Boston and Sprague Electric Elevator Company, New York City and Bloomfield, New Jersey)