{"title": "The Operative Mechanic, and British Machinist", "subtitle": "Being A Practical Display", "authors": [{"key": "/authors/OL5993870A"}], "publish_date": "1831", "publishers": ["James Kay, Jun., & Co."], "covers": [6679372, 6679374, -1], "physical_format": "Hardcover", "ocaid": "operativemechan02nichgoog", "publish_places": ["Philadelphia, USA"], "edition_name": "2nd U.S. edition", "languages": [{"key": "/languages/eng"}], "by_statement": "by John Nicholson, Esq.", "type": {"key": "/type/edition"}, "source_records": ["ia:operativemechan02nichgoog"], "key": "/books/OL20499263M", "works": [{"key": "/works/OL13098938W"}], "latest_revision": 12, "revision": 12, "created": {"type": "/type/datetime", "value": "2008-10-27T05:02:27.207622"}, "last_modified": {"type": "/type/datetime", "value": "2025-12-16T04:56:05.905985"}}