TY  - BOOK
AU  - Ludwig,Oswald A.
TI  - Metalwork: technology and practice 
U1  - 621.75 
PY  - 1947///
CY  - Bloomington, Ill.
PB  - McKnight & McKnight
KW  - Machine-shop practice
KW  - Metal-work
N1  - Includes index
ER  -