xix, 427 p. : ill. )some col.( ; 24 cm. + 1 computer disk )5 1/4 i
System requirements for computer disk: IBM compatible XT-model PC )or better(; 512K RAM; DOS 2.1 or higher; Harvard graphics program; hard disk with 6.5MB free space; CGA, EGA, VGA, or Hercules monochrome display bo