{"first_publish_date": "1966", "key": "/works/OL321385W", "title": "Trade preferences for less-developed countries", "subject_places": ["Developing countries", "United States"], "lc_classifications": ["HF1756 W5"], "authors": [{"author": {"key": "/authors/OL382133A"}, "type": {"key": "/type/author_role"}}], "subjects": ["United States", "Tariff"], "type": {"key": "/type/work"}, "dewey_number": ["382/2.0973/01724"], "latest_revision": 10, "revision": 10, "created": {"type": "/type/datetime", "value": "2009-10-27T01:51:17.020377"}, "last_modified": {"type": "/type/datetime", "value": "2026-02-19T23:21:35.737765"}}