{"first_sentence": {"type": "/type/text", "value": "The properties of vapor in, say, crude oil fractional distillation are very difficult to estimate through calculation methods."}, "physical_format": "Paperback", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "weight": "14.9 ounces", "languages": [{"key": "/l/eng"}], "publishers": ["McGraw-Hill Professional"], "number_of_pages": 416, "isbn_13": ["9780071438407"], "id": 12507212, "edition_name": "1 edition", "isbn_10": ["0071438408"], "publish_date": "June 25, 2004", "key": "/b/OL9255207M", "authors": [{"key": "/a/OL2637321A"}, {"key": "/a/OL2637322A"}], "title": "Chemical Process Calculations Manual", "type": {"key": "/type/edition"}, "subjects": ["Industrial chemistry", "Technology & Industrial Arts", "Mathematics", "Technology", "Science/Mathematics", "Engineering - Chemical & Biochemical", "Technology / Engineering / Chemical & Biochemical", "Mathematical models", "Chemical processes"], "physical_dimensions": "8.8 x 6 x 0.9 inches", "revision": 1}