{"covers": [12817145, 13772480], "first_publish_date": "1894", "key": "/works/OL151440W", "authors": [{"author": {"key": "/authors/OL22098A"}, "type": {"key": "/type/author_role"}}], "subjects": ["Symbolic and mathematical Logic", "Logic", "Nd index", "Logique symbolique et math\u00e9matique", "Logic symbolic", "L\u00f3gica simb\u00f3lica y matem\u00e1tica"], "title": "Symbolic Logic", "type": {"key": "/type/work"}, "latest_revision": 17, "revision": 17, "created": {"type": "/type/datetime", "value": "2009-10-19T23:22:20.267455"}, "last_modified": {"type": "/type/datetime", "value": "2023-11-19T18:50:21.559557"}}