国外背包探险旅游户外安全预警体系研究

Publisher: 国家哲学社会科学学术期刊数据库

E-ISSN: 1003-6539|37|1|67-72

ISSN: 1003-6539

Source: 北京第二外国语学院学报, Vol.37, Iss.1, 2015-01, pp. : 67-72

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Abstract