TY  - BOOK
AU  - Betterley, Melvin L.
AU  - xx, 686 p.
AU  - Title
TI  - Sheet metal drafting
SN  - 0070051267
PY  - 1978///
CY  - New York 
PB  - Gregg Division, McGraw-Hill
KW  - Mechanical Drawing
KW  - Sheet-metal work
KW  - Patternmaking
N1  - Includes Indexs
ER  -