00604nam a2200157Ia 45000010003000000050017000030080041000200200015000610820017000761000019000932450176001122500007002882600044002953000063003396500044004022320261006003417.0120911s9999    xx            000 0 und d  a1566041856  a620.0042 HEA  aHead, George O  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.  a6E  aChapel Hill, NC : Ventana Press, C1994.  axxii, 270 p. : ill. ; 24 cm. + 1 computer disk (31/2 in.).  aSystems engineering-mathematical models