TY  - BOOK
AU  - Helsel, Jay.D Jenson, Cecil Voisinet, Donald.D
TI  - Computer aided engineering drawing using autocad
SN  - 0-07-067568-6
U1  - 620.0042 JEN 
PY  - 1990///
CY  - NEWYORK
PB  - MCGRAW HILL
KW  - AUTOCAD-COMPUTER AIDED ENGINEERING DRAWING
ER  -