{"title": "Microfilm technology", "subjects": ["Engineering", "Engineering drawings", "Information storage and retrieval systems", "Microfilm aperture card systems", "Microphotography"], "key": "/works/OL7104298W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2013044A"}}], "type": {"key": "/type/work"}, "covers": [15075796], "latest_revision": 3, "revision": 3, "created": {"type": "/type/datetime", "value": "2009-12-10T20:23:22.065998"}, "last_modified": {"type": "/type/datetime", "value": "2025-05-13T14:43:22.878469"}}