1 Subjects: “...black medick...”

2 Subjects: “...Black Sea basin...”

3 Subjects: “...Black sea...”

4 Subjects: “...Black Mountain...”

5 Subjects: “...Black Sea...”

6 Subjects: “...Black Sea...”

7 Subjects: “...black carbon...”

8 Subjects: “...black ice...”

9 Subjects: “...black-necked crane...”

10 Subjects: “...Black Sea...”

11 Subjects: “...black triangle...”

12 Subjects: “...black locust...”

13 Subjects: “...black locust...”

14 Subjects: “...black carbon concentration...”