00457nam a2200157 4500 726 726 191122b ||||| |||| 00| 0 eng d 621.834 C7272 251 Colvin, Fred H. Gear Cutting Practice: Methods of Producing Gears for Commercial Use 3rd ed. New York McGrawhill 1950 xii, 532 p. Gearing 253 Stanley, Frank A. ddc BK 0 0 ddc 0 621_834000000000000_C7272 0 2816 CL CL 1952-10-10 621.834 C7272 00176 2019-11-22 1 BK