{"lc_classifications": ["QE75 .C5 no. 530"], "key": "/works/OL1570165W", "created": {"type": "/type/datetime", "value": "2009-12-09T21:53:40.390159"}, "title": "Gravimetric effects of petroleum accumulations", "id": 36748539, "first_publish_date": "1966", "latest_revision": 2, "last_modified": {"type": "/type/datetime", "value": "2010-01-31T04:09:03.447335"}, "authors": [{"type": "/type/author_role", "author": {"key": "/authors/OL168823A"}}], "type": {"key": "/type/work"}, "subjects": ["Gravimeters (Geophysical instruments)", "Measurement", "Geophysical methods", "Prospecting", "Petroleum", "Gravity"], "revision": 2}