by G.R. Tabouis; with a preface by Gabriel Hanotaux ..., "First edition.", Main Heritage Shelves General, DS68.9 .T33 1931, Book, Item-ID: i1015193x, BIB-ID: 1016828, Bibliography: p. 396-399., Also issued online.
by Field Marshal Earl Wavell., Main Heritage Compact General, D568.7 .W3 1931, Book, Item-ID: i25919003, BIB-ID: 2757258, Includes bibliographical references (page 248) and index.
by Harry N. Howard., Main Heritage Compact General, DR584 .H6 1931, Book, Item-ID: i25913839, BIB-ID: 2756945, Includes bibliographical references (pages 362-383).