Active Tourism in Perm Region: New Formats and Trends Sergey B. Michurin,Igor L. VolkhinLecture Notes in Networks and Systems(2021)引用 0|浏览0暂无评分关键词active tourism,perm regionAI 理解论文溯源树样例生成溯源树,研究论文发展脉络Chat Paper正在生成论文摘要