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Vogel & Shayt 1981, p. 2. Vogel, Robert M.; Shayt, David (16 September 1981). "Creusot steam hammer"(PDF). The American Society of Mechanical Engineers. Archived from the original(PDF) on 2008-10-31. Retrieved 2013-08-11.
Vogel & Shayt 1981, p. 3. Vogel, Robert M.; Shayt, David (16 September 1981). "Creusot steam hammer"(PDF). The American Society of Mechanical Engineers. Archived from the original(PDF) on 2008-10-31. Retrieved 2013-08-11.
Vogel & Shayt 1981, p. 4. Vogel, Robert M.; Shayt, David (16 September 1981). "Creusot steam hammer"(PDF). The American Society of Mechanical Engineers. Archived from the original(PDF) on 2008-10-31. Retrieved 2013-08-11.