@book{95,
	author = {Simpson, Alan, and Simpson, Alan,},
	title = {Understanding dBase IV 1.1 /},
	publisher = {Sybex,},
	year = {c1990.},
	address = {San Francisco :},
	edition = {2nd ed.},
	note = {Rev. ed. of: Understanding dBase IV, c1989.}
}