青云翻译

Yu Yan, Lu Xinhai: Jiuhua Mountain scenic estimated monetary value of tourism research. Land and Resource Technology Management, 2009 (2

Yu Yan, and Lu Xinhai: jiuhuashan scenic spot tourism resources value estimation of monetization. Land and resource management of science and technology, 2009 (2

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Yu Yan, Lu new sea Mountain Scenic Area: 9 tourism resources monetized value estimation. Land and Natural Resources Management, Science and Technology (2 2009

Yu Yan, and Lu Xinhai: jiuhuashan scenic spot tourism resources value estimation of monetization. Land and resource management of science and technology, 2009 (2