The Persecution of the Christians in Japan in the Middle of the Seventeenth Century 論文 Edward Hagemann ·1942-06-01 ·『Pacific Historical Review』 11(2) pp. 151-160 doi:10.2307/3633765
Studies on Artificial Polyploid Plants VI 論文 Ichizo Nishiyama ·1942-01-01 ·『Journal of the Japanese Society for Horticultural Science』 13(3) pp. 245-251 doi:10.2503/jjshs.13.245