{"type": {"key": "/type/edition"}, "publish_date": "1969", "publish_country": "bu", "languages": [{"key": "/languages/bul"}], "title": "Vasil Kalchev", "subtitle": "biografichen ocherk", "authors": [{"key": "/authors/OL1574514A"}], "oclc_numbers": ["78724351"], "series": ["Biblioteka Revoliutsionni bortsi"], "subject_people": ["Vasil Kalchev (-1944)"], "publishers": ["Izd-vo na Bulgarskata komunisticheska partiia"], "publish_places": ["Sofiia"], "pagination": "122 p.", "number_of_pages": 122, "source_records": ["marc:harvard_bibliographic_metadata/20220215_017.bib.mrc:243891078:952"], "works": [{"key": "/works/OL44079405W"}], "key": "/books/OL60294331M", "latest_revision": 1, "revision": 1, "created": {"type": "/type/datetime", "value": "2025-09-27T02:36:19.119742"}, "last_modified": {"type": "/type/datetime", "value": "2025-09-27T02:36:19.119742"}}