Hiroshi Yoshikura

1938

• Baiotekunorojī ōyō shokuhin no anzensei kakuho oyobi kōkinō shokuhin no kaihatsu ni kansuru kenkyū
• Baiotekunorojī ōyō shokuhin tō no anzensei hyōka ni kansuru kenkyū (H10--seikatsu--026)