1 Subjects: “...national holiday...”

2 Subjects: “...Chinese national scenic areas...”

3 Subjects: “...National Land Cover Database (NLCD)...”

4 Subjects: “...national ambient air quality standards...”

5 Subjects: “...Manu National Park...”

6 Subjects: “...cross-national case study...”

7 Subjects: “...national park...”

8 Subjects: “...LAN (Law of the Nation's Waters)...”

9 Subjects: “...national parks...”