Spatial Coverage
- Black Sea.2
- Caucasus, Northern.2
- Caucasus, South2
- Caucasus, South.2
- Moscow2
- Moscow.2
- Okhotsk, Sea of2
- Okhotsk, Sea of.2
- Siberia (Russia)2
- Siberia, Eastern.2
- Soviet Union2
- Ural Mountains Region2
- Alaska.1
- Aleutian Islands (Alaska)1
- Anadyr, Gulf of.1
- Arctic Regions.1
- Arctic regions1
- Austria1
- Bering Sea1
- Bering Sea Coast (Alaska)1
