@book{11619,
	author = {Mohr, Lawrence B.},
	title = {Impact analysis for program evaluation /},
	publisher = {Sage Publications,},
	year = {c1992.},
	address = {Newbury Park :},
	note = {Originally published: Chicago, Ill. : Dorsey Press, c1988.},
	url = {http://www.loc.gov/catdir/enhancements/fy0655/92026388-t.html}
}