{"first_sentence": {"type": "/type/text", "value": "In many irrigated areas around the world, aquatic macrophytes develop so profusively that a serious weed problem emerges (Pieterse &amp; Murphy, 1990)."}, "physical_format": "Hardcover", "weight": "2.3 pounds", "languages": [{"key": "/l/eng"}], "type": {"key": "/type/edition"}, "publishers": ["Springer"], "number_of_pages": 376, "isbn_13": ["9780792344339"], "id": 10606254, "edition_name": "<em>Reprinted from HYDROBIOLOGIA, 340</em> edition", "isbn_10": ["0792344332"], "publish_date": "February 28, 1997", "key": "/b/OL7808323M", "last_modified": {"type": "/type/datetime", "value": "2008-04-29 15:03:11.581851"}, "title": "Management and Ecology of Freshwater Plants (Developments in Hydrobiology)", "contributions": ["Joseph Caffrey (Editor)", "Philip R.F. Barrett (Editor)", "Kevin J. Murphy (Editor)", "Philip Max Wade (Editor)"], "subjects": ["Pest control", "Plant ecology", "Life Sciences - Ecology", "Ecology", "Freshwater Flora", "Science", "Life Sciences - Botany", "Science/Mathematics", "Life Sciences - Biology - Marine Biology", "Plants - General", "Nature / Plants", "Aquatic weeds", "Congresses", "Control", "Freshwater plants"], "physical_dimensions": "10.5 x 8 x 0.8 inches", "revision": 1}