@book{488,
	author = {Duffy, Tim.},
	title = {Four software tools : DOS for IBM PC and MS DOS, word processing using WordStar 5.5, spreadsheets using Lotus 1-2-3 release 2.01, database management using dBase III plus / Tim Duffy.},
	address = {Belmont, Calif. : Wadsworth, c1990.},
	edition = {2nd ed.}
}