{"notes": {"type": "/type/text", "value": "Library system has : 1949 -\n\n1"}, "title": "Gypsum Industry.", "authors": [{"key": "/authors/OL1590081A"}], "series": ["Dbs Catalogue -- 44-208"], "languages": [{"key": "/languages/eng"}], "publish_country": "onc", "type": {"key": "/type/edition"}, "source_records": ["marc:marc_laurentian/openlibrary.mrc:225568828:692"], "key": "/books/OL20666148M", "works": [{"key": "/works/OL6182476W"}], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2008-10-29T08:55:12.689203"}, "last_modified": {"type": "/type/datetime", "value": "2026-04-20T14:09:42.579822"}}