Williams, Al.. DOS 5 : a developer`s guide advanced programming guide to DOS / Al Williams. - New Delhi : BPB Publications , 1993. - 5 ,914p : ill.,figs ; 23cm . NULL ISBN: 8170291615 Rs. 225.00 Subjects--Index Terms: OPERATING SYSTEMS (COMPUTERS)-DOS 5 Dewey Class. No.: 005.432.D5 / WIL/D