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- 1000 AutoCAD Tips and Tricks : Revised and Updated for Release 13 for Windows / George O. HEAD, Jan Doster HEAD . Chapel Hill : Ventana Press, [1995] . 567 s . ISBN 1-56604-141-1 . [1, currently available 1]
- 1000 AutoCAD Tips and Tricks : Disketa / George O. HEAD, Jan Doster HEAD . Chapel Hill : Ventana Press, [1995] . [1, currently available 1]
- The AutoCAD 3D Book / George O. HEAD, Charles A. PIETRA, Kenneth J.L. SEGAL . Chapel Hill : Ventana Press, [1989] . 29,319 s . [1, currently available 1]