TY  - BOOK
AU  - Houghton P S
TI  - Gears: spur, helical, bevel, and worm
U1  - 621.83 
PY  - 1952///
CY  - London
PB  - Technical Press
KW  - Gears
N1  - A treatise for draughtsmen, shop superintendents, foremen, mechanics and students
ER  -