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  • Date = 1919
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Pittsburgh first vol. 2 1920-1921
Pittsburgh first vol. 2 1920-1921
Pittsburgh first vol. 7 1925-1926
Pittsburgh first vol. 7 1925-1926
American drop forger - 1919
American drop forger - 1919
Metal-work -- Periodicals., Steel industry and trade -- Periodicals.
Organ of the American Drop Forge Association, 1914-Apr. 1916.
Pittsburgh_Basing_Point
Applications, answers and statements concerning the so-called Pittsburgh basing point for steel.
Steel -- Prices -- United States., Steel industry and trade -- United States., Price discrimination -- United States., Basing-point system.
191 pages 27 cm.
The aero blue book and directory of aeronautic organizations
The aero blue book and directory of aeronautic organizations
Aeronautics -- Societies, etc., Aeronautics -- United States., Airways -- United States., Aeronautics -- Directories.
Textbook of aerial transportation, aerial sports, aerial mail service, American airways, aeronautical maps, international and national aeronautic trophies and prizes, aviation records, etc., and directory of aeronautic associations