{"identifiers": {"goodreads": ["4332995"]}, "title": "Mainline Progress A", "subtitle": "Teacher's Book (New Concept English)", "authors": [{"key": "/authors/OL712728A"}, {"key": "/authors/OL3288514A"}], "publish_date": "March 1981", "publishers": ["Addison Wesley Longman ELT Division (a Pearson Education company)"], "type": {"key": "/type/edition"}, "isbn_13": ["9780582515390"], "isbn_10": ["0582515394"], "oclc_numbers": ["220261675"], "physical_format": "Paperback", "subjects": ["ELT: Learning Material & Coursework"], "source_records": ["amazon:0582515394"], "key": "/books/OL10692907M", "number_of_pages": 144, "latest_revision": 6, "revision": 6, "created": {"type": "/type/datetime", "value": "2008-04-30T09:38:13.731961"}, "last_modified": {"type": "/type/datetime", "value": "2026-03-21T20:01:45.782322"}}