Susumu Higuchi

1954

• Chiiki ni okeru sābisu jigyōsha tō no renkei no arikata ni kansuru chōsa kenkyū jigyō
• Chiiki ni okeru sābisu jigyōsha tō no renkei no arikata ni kansuru chōsa kenkyū jigyō
• Izonshōsha no shakai seikatsu ni taisuru shien no tame no hōkatsuteki na chiiki seikatsu shien jigyō sōkatsu jigyō hōkokusho