Fritz H. Grupe

Beginning Lotus 1-2-3, Version 2.2

1991

Beginning Wordperfect

1988

Advanced DOS: Applications, Cases, and Solutions

1991

Beginning Lotus 1-2-3 for Windows

1993

Advanced DOS 5.0 and Windows 3.1

1994

Wordperfect 5.1, Lotus 1-2-3, Version 2.2, and dBASE IV: Cases and Solutions