Denshi joho no hozon: Ima wareware ga kangaerubeki koto 
Subtitle: Dai 9-kai Shiryo Hozon Shinpojumu koenshu (Shiryo hozon shinpojumu)
Publisher: Nihon Toshokan Kyokai
Published: 1999
Language: jpn
Format: Unknown Binding
Number of pages: 91
ISBN-13: 9784820499176