TY  - BOOK
AU  - Colvin, Fred H. 
AU  - Stanley, Frank A. 
TI  - Gear cutting practice : : methods of producing gears for commercial use
U1  - 621.944 COL S 
PY  - 1950///.
CY  - New York : 
PB  - McGraw-Hill Book Company, Inc., 
KW  - Gearing
N1  - Includes index.
ER  -