@book{61454,
	author = {Campbell, Angus and United States},
	title = {Supplemental studies for the National Advisory Commission on Civil Disorders.},
	publisher = {U.S. Govt. Print. Office},
	year = {1968.},
	address = {Washington},
	note = {"The studies were conducted independently of the Commission and of each other by research groups at the University of Michigan, the Johns Hopkins University, and Columbia University."}
}