TY  - GEN
AU  - Jones, Harry A.
TI  - Progressive lessons in machine shop practice
U1  - 670.423 
PY  - 1952///
CY  - Toronto
PB  - Thomas Nelson & Sons
KW  - Machine shops
KW  - Machine shop practice
KW  - Drilling and boring
KW  - Grinding and polishing
ER  -