TY  - BOOK
AU  - Leach, James A.
TI  - AutoCad 13 companion / 
SN  - 0256194467
U1  - 604.20285 
PY  - 1996///]
CY  - Boston : 
PB  - McGraw-Hill, 
KW  - Drawing
KW  - Geometrical drawing
KW  - Mechanical drafting--computer software
N1  - Includes index
ER  -