TY  - BOOK
AU  - Neubecker, William
TI  - Sheet metal work; a manual of practical self-instruction in the art of pattern drafting and construction work in light-and heavy-gauge metal,including skylight,roofing,cornice woke,patterns for forced-air fittings,ect
U1  - 621.704 
PY  - 1946///
CY  - New York
PB  - American technical society
ER  -