Title: Seibu jiken : "Tsutsumi-ke" shihai to Nihon shakai /
Authors: Yoshino, Gentarō, 1943-
Publisher: Nihon Keizai Shinbunsha,
Year: 2005
Subjects: Tsutsumi, Yasujirō,; Tsutsumi, Yoshiaki,; Seibu Group.