@book{58669,
	author = {Knorr, Klaus, and Verba, Sidney, and Woodrow Wilson School of Public and International Affairs.},
	title = {The international system :},
	publisher = {Princeton University Press,},
	year = {1967.},
	address = {Princeton, N.J. :},
	note = {"A revision of papers first presented at a Symposium on International Relations Theory... sponsored by the Center of International Studies and held in Princeton in September 1960".}
}