{"type": {"key": "/type/edition"}, "publish_date": "1940", "publish_country": "xx", "languages": [{"key": "/languages/eng"}], "title": "Mathematics in action", "by_statement": "by Walter W. Hart and Lora D. Jahn", "authors": [{"key": "/authors/OL14091476A"}, {"key": "/authors/OL16187001A"}], "oclc_numbers": ["909671"], "lc_classifications": ["QA36.5 .H3"], "subjects": ["Mathematics"], "publishers": ["D. C. Heath and company"], "publish_places": ["Boston", "New York [etc]"], "pagination": "3 v.", "source_records": ["marc:harvard_bibliographic_metadata/20220215_031.bib.mrc:93649756:1423"], "full_title": "Mathematics in action", "works": [{"key": "/works/OL44930555W"}], "key": "/books/OL61312972M", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2026-02-14T21:55:03.174079"}, "last_modified": {"type": "/type/datetime", "value": "2026-02-14T21:55:03.174079"}}