Learning Dos, wordperfect 4.2, Lotus 1-2-3, twin 15, and dBase III plus - Cassel, Don (Englewood Cliffs, N.J. : Prentice Hall, 1990)
Includes index.
Keywords: dBase III plus (Computer program); DOS (Computer operating system); Lotus 1-2-3 (Computer program); Structured programming; WordPerfect (Computer program)