"Word processing." . . . . . "Mastering WordPerfect 6.1 for Windows"@en . "Mastering WordPerfect 6.1 for Windows" . "Mastering WordPerfect 6.1 for Windows = Simpson, A" . . . "Of new features: For experienced users: side 1131-1139" . "WordPerfect 6.1 for Windows" . . . . . . . . . "WordPerfect (Computer file)" . .