In This Review

Der Verrat Im 20. Jahrhundert
Der Verrat Im 20. Jahrhundert
By Margret Boveri
Rowohlt, 1956, 4 pp
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This major study of treason in the twentieth century, individual volumes of which have appeared over the last four years, includes both open and secret opposition, defectors to and from Communism, and, in the fourth volume, events on the American scene.