SIMPSON, ALAN UNDERSTANDING DBASE IV 1.5 FOR DOS 3ED ED / SIMPSON, ALAN - [S.N] : SYBEX INC. ، 1992 - 1002 P Subjects--Topical Terms: DBASE IV 2.0 (COMPUTER PROGRM )DOS DEVICE DRIVERS (COMPUTER PROGRAM ) Dewey Class. No.: 005.7565 / SU