Harvey, Greg. WordPerfect 5.1 instant reference for DOS/ Greg Harvey and Kay Yarborough Nelson. - San Francisco : SYBEX, c1990. - xix, 252 p. ; 21 cm. - The SYBEX prompter series . Include index. ISBN: 089588674X : $7.95 LCCN: 89090543 Subjects--Uniform Titles: WordPerfect (Computer file) Subjects--Topical Terms: Word processing. LC Class. No.: Z 52.5.W65 / H357 1990 Dewey Class. No.: 652.5/536