共 50 条
- [32] THE INTERNATIONAL LABOR ORGANIZATION IN A CHANGING WORLD ANNALS OF THE AMERICAN ACADEMY OF POLITICAL AND SOCIAL SCIENCE, 1957, 310 (MAR): : 31 - 38
- [33] WORLD SOCIETY, INTERNATIONAL ORGANIZATION AND BEHAVIOR ROCKY MOUNTAIN SOCIAL SCIENCE JOURNAL, 1974, 11 (01): : 87 - 91
- [36] Tourism, ecotourism, and protected areas: the state of nature-based tourism around the world and guidelines for its development. GEOGRAPHICAL JOURNAL, 1998, 164 : 349 - 350
- [40] THE INTERNATIONAL SPACE YEAR - PRIORITIES AND PERSPECTIVES NUOVO CIMENTO DELLA SOCIETA ITALIANA DI FISICA C-GEOPHYSICS AND SPACE PHYSICS, 1990, 13 (05): : 835 - 846