18/12/25 【E-book】ProQuest Ebook Central Maintenance Alert(1/6, 1/20)


ProQuest Ebook Central may not be available during the following period due to system
maintenance.
Sorry for inconvenience.

【Maintenance Period 1】 From Sunday, January 6, 2:00 am to 4:00 am (JST)
【Maintenance Period 2】 From Sunday, January 20, 12:00 pm to 8:00 pm (JST)