【バナッハタルスキの密室: 『数学者シャーロック・ホームズ』増補・改題/瀬山士郎】を読んだ本に追加 →http://book.akahoshitakuya.com/b/4535787409 #bookmeter
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【バナッハタルスキの密室: 『数学者シャーロック・ホームズ』増補・改題/瀬山士郎】を読んだ本に追加 →http://book.akahoshitakuya.com/b/4535787409 #bookmeter