{"isbn_13": ["9780471384373"], "subtitle": "Principles and Applications", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 13:35:46.87638"}, "languages": [{"key": "/l/eng"}], "publishers": ["Wiley"], "number_of_pages": 928, "first_sentence": {"type": "/type/text", "value": "ISOTOPE geology is concerned with the measurement and interpretation of the variations of the isotope composition of certain elements in natural materials. These variations are the result of two quite different processes:"}, "isbn_10": ["0471384372"], "publish_date": "October 18, 2004", "key": "/b/OL7616186M", "authors": [{"key": "/a/OL401392A"}, {"key": "/a/OL2738598A"}], "title": "Isotopes", "type": {"key": "/type/edition"}, "id": 10367150, "revision": 1}