FloodSmart. National FloodInsuranceProgram. [7 March 2016]. (原始内容存档于2016-03-08). Eychaner, J.H. (2015) Lessons from a 500-year record of flood elevations Association
Control Program. Natural Resources Conservation Service. U.S. Department of Agriculture. 2010-07-12 [2012-03-04]. (原始内容存档于2021-06-10) (英语). National Research