Coplin, William D., Introduction to International Politics : A Theoretical Overview, Chicago, Markham Publishing Company, 1971, 391 p + xix p. / Kegley, Charles (eds.), A Multi-Method Introduction du International Politics : Observation, Explanation and Prescription, Chicago, Markham, 1971, 434 p. + xiiip. - de Kerckhove, F. (Études internationales, 1971)