{"last_modified": {"type": "/type/datetime", "value": "2010-12-06T07:36:34.281650"}, "title": "Criteria pollutant emissions from internal combustion engines in the natural gas industry", "created": {"type": "/type/datetime", "value": "2009-12-11T02:54:44.794170"}, "subjects": ["Air", "Environmental aspects", "Environmental aspects of Internal combustion engines", "Equipment and supplies", "Gas industry", "Internal combustion engines", "Pollution"], "latest_revision": 3, "key": "/works/OL10397262W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL4312297A"}}], "type": {"key": "/type/work"}, "revision": 3}