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August 27, 2021 | Edited by Jenner | Merge works |
March 26, 2021 | Edited by MARC Bot | import existing book |
February 14, 2020 | Edited by MARC Bot | remove fake subjects |
November 10, 2019 | Edited by dcapillae | Added new cover |
October 5, 2017 | Edited by MARC Bot | adding to Long Now Manual for Civilization |