Simpson, Alan, 1953- Mastering WordPerfect 5.1 / Alan Simpson. - 1st ed - San Francisco : SYBEX, c1990. - xxxix, 1044 p. : ill. ; 23 cm. ISBN: 0895886707 : $26.95 LCCN: 89051776 Subjects--Uniform Titles: WordPerfect (Computer file) Subjects--Topical Terms: Word processing. LC Class. No.: Z52.5.W65 / S55 1990 Dewey Class. No.: 652.55369