Grun, B., & Stein,Werner,Joint author. (1979). The timetables of history: A horizon linkage of people and events (new updated ed.). Simon and Schuster.

Grun, Bernard, and Stein,Werner,Joint author. The Timetables of History: A Horizon Linkage of People and Events. new updated ed. New York: Simon and Schuster, 1979.

Grun, Bernard, and Stein,Werner,Joint author. The Timetables of History: A Horizon Linkage of People and Events. new updated ed. Simon and Schuster, 1979.