{"first_publish_date": "1898", "title": "A study of the igneous rocks at York Haven and Stony Brook, Pa. and their accompanying formations ..", "covers": [5681598], "subject_places": ["Pennsylvania"], "lc_classifications": ["QE461 .E33"], "key": "/works/OL232282W", "authors": [{"type": {"key": "/type/author_role"}, "author": {"key": "/authors/OL2507628A"}}], "type": {"key": "/type/work"}, "subjects": ["Igneous Rocks", "Geology"], "latest_revision": 7, "revision": 7, "created": {"type": "/type/datetime", "value": "2009-10-23T05:07:55.723671"}, "last_modified": {"type": "/type/datetime", "value": "2025-05-13T06:15:30.190413"}}