6NPS.Criteria for Boundary Adjustments Supplement to Planning Process Guideline(NPS-2)[S].1991:5-10.
7NPS.Park Planning Program Standards[S].2004:4-8.
8NPS.Director's Order on Park Planning[S].1998.
9U S Department of the Interior,NPS,Denver Service Center.The Visitor Experience and Resource Protection (VERP) Framework-A Handbook for Planners and Managers[S].1997.
10Dorothy H Anderson,David W Lime,Theresa L Wang.Maintaining the Quality of Park Resources and Visitor Experiences-A Handbook for Managers[M].Department of Forest Resources,University of Minnesota,1998.
