{"isbn_13": ["9780812237856"], "physical_format": "Hardcover", "subtitle": "A Complete Reference Guide", "weight": "2.6 pounds", "languages": [{"key": "/l/eng"}], "publishers": ["University of Pennsylvania Press"], "number_of_pages": 407, "last_modified": {"type": "/type/datetime", "value": "2008-04-30 09:38:13.731961"}, "id": 13138162, "first_sentence": {"type": "/type/text", "value": "Trees dominate the natural landscape of Pennsylvania; homeowners plant trees to enhance their properties, and municipalities invest in shade trees to make communities more attractive."}, "isbn_10": ["0812237854"], "publish_date": "December 30, 2004", "key": "/b/OL9791608M", "authors": [{"key": "/a/OL2938623A"}, {"key": "/a/OL3249784A"}, {"key": "/a/OL3326822A"}], "title": "Trees Of Pennsylvania", "type": {"key": "/type/edition"}, "subjects": ["Shrubs & trees", "Pictorial works", "Nature", "Nature/Ecology", "Trees", "Trees & Forests - General", "Identification", "Pennsylvania"], "physical_dimensions": "10.3 x 7.3 x 1.2 inches", "revision": 1}