7Christof Mauch,Thomas Zeller.Landscapes and roads in north America and Europe:cultural history in transatlantic perspective[R].Conference at the GHI,October 11-13,2002.
8Gary R Clay,Robert K Smidt.Assessing the validity and reliability of descriptor variables used in scenic highway analysis[J].Landscape and Urban Planning,2004,66:239-255.
9Khaled Ksaibati,Eugene M Wilson,Donald S Warde,Gene Bryan.Evaluation criteria foe scenic loop tours[R].University of Wyoming and Wyoming Department of Commerce.1994.3.
10Flink C A,Searns R M.Greenways:A Guide to Planning,Design,and Development.The Conservation Fund[M].Washington,DC:Island Press,1993.
