Alpine Flowers of Japan by H. TakedaMax v. KüenburgMN 2:1 (1939) p. 330 → jstor.org/stable/2382581ShareAn Economic History of Japan by Takao Tsuchiya, Michitaro Shidehara, Neil Skene Smith, Kurt Singer; The Social and Economic History of Japan by Eijiro HonjoHarvard Journal of Asiatic Studies, Vol III, number 2, July 1938