eBook Commerce and Knowledge Circulation Infrastructure of ICT Society 論文 Noboru Sonehara・Tohru Sampei ·2012-01-01 ·『Denshi Jouhou Tsuushin Gakkai Tsuushin Sosaieti magajin/B-plus/Denshi Jouhou Tsuushin Gakkai Tsuushin Sosaeti magajin』 6(1) pp. 6-15 doi:10.1587/bplus.6.6