{"title": "Proceedings of the Academy of Natural Sciences of Philadelphia, Volume 21", "authors": [{"key": "/authors/OL1809183A"}], "publish_date": "1865", "publishers": ["Academy of Natural Sciences of Philadelphia"], "covers": [9678769], "ocaid": "proceedingsacad01philgoog", "publish_places": ["Philadelphia"], "type": {"key": "/type/edition"}, "oclc_numbers": ["1382862"], "source_records": ["ia:proceedingsacad01philgoog"], "key": "/books/OL20615331M", "number_of_pages": 334, "works": [{"key": "/works/OL16248407W"}], "latest_revision": 8, "revision": 8, "created": {"type": "/type/datetime", "value": "2008-10-27T16:16:48.523380"}, "last_modified": {"type": "/type/datetime", "value": "2025-12-23T07:48:17.650725"}}