Type metal. Type metal investigation: Graphs of variations in composition of type metal in use, investigation conducted by Government Printing Office in cooperation with American Newspaper Publishers' Association, June 13, 1929.
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Type metal. Type metal investigation: Graphs of variations in composition of type metal in use, investigation conducted by Government Printing Office in cooperation with American Newspaper Publishers' Association, June 13, 1929.
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Type metal. Type metal investigation: Graphs of variations in composition of type metal in use, investigation conducted by Government Printing Office in cooperation with American Newspaper Publishers' Association, June 13, 1929.