00446nam a2200157Ia 4500 351 20261006003437.0 120911s9999 xx 000 0 und d 0534984991 005.36 DUF Duffy Tim 662 Four software tools : with wordperfect 5.0/5.1 , Lotus 123 and D base 111 Plus / Tim Duffy 2nd ed. WADWORTH PC DOS (COMPUTER OPERATING SYSTEM) 663 351 351 0 0 0 0 NU NU 2012-09-11 0 005.36 DUF 1124 2012-09-11 00:00:00 2012-09-11 OS