Bullets and Bureaucrats: The Machine Gun and the United States Army, 1861-1916 - David A. Armstrong, Jay Luvaas - Google Books

http://books.google.de/books?id=nFeyKvD93C4C&pg=PA42&dq=Vandenburgh+Gun&hl=de&ei=i5CNTZ-8CozItAbb7I2HCg&sa=X&oi=book_result&ct=r

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