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2014 New York State Statistical Yearbook. The Nelson A. Rockefeller Institute of Government, 2014, Section O: Environmental Conservation and Recreation, S.Table O-9 (englisch, rockinst.org (Memento des Originals vom 24. September 2015 im Internet Archive) [abgerufen am 3. Februar 2016]).
2014 New York State Statistical Yearbook. The Nelson A. Rockefeller Institute of Government, 2014, Section O: Environmental Conservation and Recreation, S.Table O-9 (englisch, rockinst.org (Memento des Originals vom 24. September 2015 im Internet Archive) [abgerufen am 3. Februar 2016]).