The Changing Map of Asia by W. Gordon East, O. H. K. SpateLawrence H. BattistiniMN 8:1/2 (1952) p. 416 → jstor.org/stable/2383018ShareThe Prehistory of Japan by Gerard Groot, Bertram S. KrausDōkyō no Kisoteki Kenkyū by Fukui Kōjun