{"languages": [{"key": "/l/eng"}], "physical_format": "Hardcover", "subtitle": "Lectures on Natural Philosophy 1903-1906", "last_modified": {"type": "/type/datetime", "value": "2008-04-30 20:50:18.033121"}, "publishers": ["Springer"], "number_of_pages": 303, "id": 16841736, "isbn_13": ["9783540517160"], "isbn_10": ["3540517162"], "publish_date": "August 1990", "key": "/b/OL12775905M", "authors": [{"key": "/a/OL498763A"}], "title": "Ludwig Boltzmann: Principien Der Naturfilosofi", "type": {"key": "/type/edition"}, "subjects": ["Cosmology", "Physics", "Science"], "revision": 1}