{"first_publish_date": "1968", "key": "/works/OL2816979W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL419434A"}}], "subjects": ["Folk songs, Puerto Rican", "History and criticism", "Puerto Rican Folk songs", "Folk songs"], "title": "La copla y el romance populares en la tradicio\u0301n oral de Puerto Rico", "lc_classifications": ["PQ7430 .C35"], "type": {"key": "/type/work"}, "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-10T00:30:01.637965"}, "last_modified": {"type": "/type/datetime", "value": "2024-07-29T17:38:45.101531"}}