{"languages": [{"key": "/l/eng"}], "physical_format": "Paperback", "subtitle": "Proceedings of a Symposium (ASA special publication)", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "publishers": ["Amer Society of Agronomy"], "number_of_pages": 127, "id": 11130184, "isbn_13": ["9780891180463"], "isbn_10": ["089118046X"], "publish_date": "June 1976", "key": "/b/OL8219256M", "authors": [{"key": "/a/OL2897229A"}], "title": "Biological N Fixation in Forage-Livestock Systems", "type": {"key": "/type/edition"}, "subjects": ["Fixation", "Forage plants", "Nitrogen", "Congresses", "Nitrogen-fixing plants"], "revision": 1}