Back, Edwin A; Campbell, Alan K. (1962). Case studies in American government :the Inter-University case program /Edwin A. Back and Alan K. Campbell. New York :: Englewood Cliffs,.
Back, Edwin A; Campbell, Alan K. Case studies in American government :the Inter-University case program /Edwin A. Back and Alan K. Campbell. New York :: Englewood Cliffs,, 1962
Back, Edwin A; Campbell, Alan K. Case studies in American government :the Inter-University case program /Edwin A. Back and Alan K. Campbell. New York :: Englewood Cliffs,, 1962.