{"subtitle": "instructions in the standard operating procedures for the Kelsh plotter, including a description of equipment.", "created": {"type": "/type/datetime", "value": "2009-12-09T06:58:05.942628"}, "title": "Topographic instructions of the United States Geological Survey: Kelsh plotter procedures", "subject_places": ["United States"], "last_modified": {"type": "/type/datetime", "value": "2010-04-29T05:19:43.409010"}, "latest_revision": 2, "key": "/works/OL901828W", "authors": [{"type": "/type/author_role", "author": {"key": "/authors/OL79165A"}}], "type": {"key": "/type/work"}, "subjects": ["Surveys", "Cartography", "Plotting", "Topographical surveying"], "revision": 2}