@book{7340,
	author = {Simpson, Alan.},
	title = {Understanding dbase iv :},
	publisher = {Sybex Inc,},
	year = {1989.},
	address = {[S.l.] :},
	edition = {Special ed.},
	url = {http://www.amazon.com/exec/obidos/ASIN/0895885093/chopaconline-20}
}