Chapter XVI

“Drop Forging, Die Sinking and Machine Forging of Tools of Steel,” J.
V. Woodworth, N. W. Henley Publishing Co., New York.

“Metal Working,” Hasluck, David McKay, 1907.

“Drop Forging,” Machinery’s Reference Series No. 45.

“Press Working of Metals,” Oberlin Smith, John Wiley & Sons (1913).