{"subjects": ["Plastics", "Extrusion", "Molding", "Plastics, molding", "Plastics, extrusion"], "key": "/works/OL9858243W", "title": "National Certification in Plastics Study Guide", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL3841942A"}}], "type": {"key": "/type/work"}, "covers": [2921082], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-11T01:34:33.733035"}, "last_modified": {"type": "/type/datetime", "value": "2023-07-17T04:07:57.324103"}}