TY  - BOOK
AU  - Helsel, Jay D.
AU  - Jensen, Cecil
TI  - Engineering drawing and design
SN  - 0070325332
U1  - R 604.2 21st ed.
PY  - 1985///
CY  - New York
PB  - McGraw-Hill
KW  - Engineering design
KW  - Engineering drawings
KW  - Mechanical drawing
N1  - Index: pp 777-88
ER  -