{"first_publish_date": "1992", "title": "Introduction to digital and data communications", "covers": [3972232], "lc_classifications": ["TK5103.7 .M547 1992"], "key": "/works/OL3274861W", "authors": [{"author": {"key": "/authors/OL13968418A"}, "type": {"key": "/type/author_role"}}], "dewey_number": ["004.6"], "subjects": ["Digital communications", "Data transmission systems"], "type": {"key": "/type/work"}, "latest_revision": 4, "revision": 4, "created": {"type": "/type/datetime", "value": "2009-12-10T03:11:47.032260"}, "last_modified": {"type": "/type/datetime", "value": "2024-07-28T20:51:43.727934"}}