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020 _a1566041856
082 _a620.0042 HEA
100 _aHead, George O
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245 _aAutocad productivity book : the non-programmer's guide to customizing autocad--for release 13 for windows / James L. Brittain, George O. Head & A. Ted Schaefer..- 6th ed.
250 _a6E
260 _aChapel Hill, NC : Ventana Press, C1994.
300 _axxii, 270 p. : ill. ; 24 cm. + 1 computer disk (31/2 in.).
650 _aSystems engineering-mathematical models
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999 _c23
_d23