{"notes": {"type": "/type/text", "value": "11"}, "title": "The Portland cement industry in Ontario", "publishers": ["Ontario Dept. of Mines"], "pagination": "17 p.", "languages": [{"key": "/languages/eng"}], "publish_places": ["Toronto"], "subjects": ["Cement industry - Ontario"], "type": {"key": "/type/edition"}, "source_records": ["marc:marc_laurentian/openlibrary.mrc:587209713:480"], "key": "/books/OL22008031M", "number_of_pages": 17, "latest_revision": 2, "revision": 2, "created": {"type": "/type/datetime", "value": "2008-11-06T01:14:27.877601"}, "last_modified": {"type": "/type/datetime", "value": "2026-05-13T03:23:44.370369"}}