{"first_sentence": {"type": "/type/text", "value": "The four seas of China, the Bohai Sea, the Huanghai Sea, the East China Sea, and the South China Sea, occupy a total area of about 4.7 million km2, half of the area of China mainland."}, "physical_format": "Hardcover", "weight": "1.3 pounds", "languages": [{"key": "/l/eng"}], "type": {"key": "/type/edition"}, "publishers": ["Springer"], "number_of_pages": 240, "isbn_13": ["9780792326175"], "id": 10604875, "edition_name": "1 edition", "isbn_10": ["0792326172"], "publish_date": "December 31, 1993", "key": "/b/OL7807380M", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "title": "Oceanology of China Seas Volume 1 & 2", "contributions": ["Zhou Di (Editor)", "Liang Yan-Bo (Editor)", "Zeng Cheng-Kui (C.K. Tseng) (Editor)"], "subjects": ["Oceanography (seas)", "Oceanography (General)", "Science", "Science/Mathematics", "China", "Earth Sciences - Oceanography", "Engineering - General", "Science / Oceanography", "China Sea", "Oceanography"], "physical_dimensions": "10 x 6.8 x 0.8 inches", "revision": 1}