TY  - BOOK
AU  - Leach 
TI  - AutoCAD 13 companion 
SN  - 0256194467
U1  - 604.004202855369 LEA 1996 
PY  - 1996///
CY  - Chicago
PB  - Irwin
KW  - AutoCAD (Computer file)
KW  - Computer graphics
N1  - Includes index
ER  -