{"type": {"key": "/type/work"}, "title": "Facts about concrete masonry", "subjects": ["Catalogs", "Concrete blocks", "Cinder blocks", "Concrete construction", "Artificial Stone", "Masonry", "National Concrete Masonry Association"], "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL6179182A"}}], "covers": [12733207], "key": "/works/OL27733713W", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2022-05-06T07:17:18.000773"}, "last_modified": {"type": "/type/datetime", "value": "2022-05-06T07:17:18.000773"}}