共 22 条
- [1] THE REGIONAL ECONOMIC-IMPACT OF TOURISM AND RECREATION IN NATIONAL-PARKS ENVIRONMENT AND PLANNING B-PLANNING & DESIGN, 1986, 13 (03): : 349 - 366
- [5] ECONOMIC-IMPACT OF ACID PRECIPITATION - A CANADIAN PERSPECTIVE ABSTRACTS OF PAPERS OF THE AMERICAN CHEMICAL SOCIETY, 1982, 183 (MAR): : 151 - ENVR
- [6] Research to guide management of outdoor recreation and tourism in parks and protected areas KOEDOE, 2014, 56 (02):