Josei shūrō to atarashii hatarakikata ni kansuru chōsa kenkyū : Heisei 2-nendo Tsūshō Sangyōshō itaku chōsa hōkokusho : 21-seiki ni okeru shōgai jikan no haibun tō ni kansuru chōsa kenkyū. (Yoka Kaihatsu Sentā, 1991)