6JAMES R H. The economic value of beaches -A 2008 update [J] . Shore & Beach, 2008, 76 (8) : 22 -26.
7Clean Beaches Council. The Blue Wave Campaign, Promoting Clean and Safe Beaches [ Z/OL] . 2007. [ 2009 -02 -08 ] http: //www. cleanbeaches, org/bluewave/bluewave, cfm.
8WIEGEL R L. Dade County, Florida, Beach Nourishment and Hurricane Surge Study [J] . Shore & Beach, 1992, 60 (4) : 2 -26.
9National Park Service. 2006 Recreation Visitors Ranked by Number of Visitors [ R/OL] . 2007. [ 2009 -02 -08 ] http: //www. nature, nps. gov/stats/ranked2006, pdf.
10PHILIP K. The Fiscal Impact of Beaches in California [ R/OL ] . San Francisco: Public Research Institute, San Francisco State University, 1999. [ 2009 - 02 - 08 ] . http : //online. sfsu. edu/- pgking/handouts/thefiscalimpactofbeaches, pdf.