TY  - BOOK
AU  - Head, George O.
AU  - Pietra, Charles A.
AU  - Segal, Kenneth J. L.
TI  - The auto cad 3D book
U1  - 006.693 
PY  - 1990///
CY  - New Delhi
PB  - Galgotia Pub.
KW  - Computer Aided Design
N2  - 2001-03-30
ER  -