{"physical_format": "Hardcover", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "publishers": ["Cambridge University Press"], "title": "Principia Mathematica Cohen 1", "id": 13888378, "isbn_13": ["9780521076463"], "isbn_10": ["0521076463"], "key": "/b/OL10435422M", "authors": [{"key": "/a/OL2688531A"}], "type": {"key": "/type/edition"}, "subjects": ["Physics", "Science", "Science / Physics"], "revision": 1}