{"notes": {"type": "/type/text", "value": "1"}, "title": "Exploration of the Gray and Bautsch Lead and Zinc Deposits, jo Daviess County, Ill.", "authors": [{"key": "/authors/OL160635A"}], "publish_date": "1945", "publishers": ["s.n"], "series": ["Report of investigations (United States. Bureau of Mines) -- 3947"], "contributions": ["Zinner, P.", "Lincoln, F."], "languages": [{"key": "/languages/eng"}], "publish_places": ["S.l"], "type": {"key": "/type/edition"}, "source_records": ["marc:marc_laurentian/openlibrary.mrc:497827046:840"], "key": "/books/OL21749162M", "works": [{"key": "/works/OL1508498W"}], "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2008-11-03T19:40:46.804408"}, "last_modified": {"type": "/type/datetime", "value": "2026-01-22T03:57:10.694814"}}