{"first_publish_date": "1902", "last_modified": {"type": "/type/datetime", "value": "2020-08-13T00:40:55.802407"}, "title": "A practical treatise on mine surveying", "created": {"type": "/type/datetime", "value": "2009-10-23T02:03:05.042439"}, "covers": [5686724], "lc_classifications": ["TN273 .L96"], "latest_revision": 6, "key": "/works/OL228630W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2500049A"}}], "type": {"key": "/type/work"}, "subjects": ["Mine surveying", "Coal mines and mining"], "revision": 6}