{"type": {"key": "/type/edition"}, "publish_date": "1924", "publish_country": "mau", "languages": [{"key": "/languages/eng"}], "title": "Heredity vs. environment", "subtitle": "a study of twins", "by_statement": "John Caleb Page", "authors": [{"key": "/authors/OL15071979A"}, {"key": "/authors/OL6955501A"}], "oclc_numbers": ["18399110"], "notes": {"type": "/type/text", "value": "Thesis (Ed. M.)--Harvard Graduate School of Education, 1924."}, "subjects": ["Human Heredity", "Human beings", "Effect of environment on", "Twins"], "pagination": "1 v. in various foliations", "source_records": ["marc:harvard_bibliographic_metadata/ab.bib.01.20150123.full.mrc:532094882:692", "marc:harvard_bibliographic_metadata/20220215_032.bib.mrc:73672593:1341"], "full_title": "Heredity vs. environment a study of twins", "works": [{"key": "/works/OL42584560W"}], "key": "/books/OL57821916M", "latest_revision": 2, "revision": 2, "created": {"type": "/type/datetime", "value": "2025-02-22T02:18:29.057027"}, "last_modified": {"type": "/type/datetime", "value": "2026-02-13T23:52:03.878522"}}