{"first_publish_date": "1975", "last_modified": {"type": "/type/datetime", "value": "2020-10-16T13:53:20.869843"}, "title": "Costs and returns for selected crops in Closed Basin, San Luis Valley, Colorado, 1974", "created": {"type": "/type/datetime", "value": "2009-12-10T02:52:21.731904"}, "subject_places": ["Colorado", "San Luis Valley"], "lc_classifications": ["S41 .Z33 no. 490A", "S616.U6 .Z33 no. 490A"], "latest_revision": 4, "key": "/works/OL3216612W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL520308A"}}], "dewey_number": ["338.1/08 s", "338.1/6"], "type": {"key": "/type/work"}, "subjects": ["Economic aspects", "Economic aspects of Irrigation farming", "Irrigation farming", "San Luis Valley Project", "Statistics", "San Luis Valley project"], "revision": 4}