Geographic Subject
4.210
Netherlands
138
4.415
15
4.240
11
4.280
7
Great Britain
5
4.220
4
5.580
4
Europe
4
4.070
2
4.210.150
2
7.150
2
Denmark
2
France
2
Germany (West)
2
Indonesia
2
Pays-Bas
2
2
1
3.113
1
4
1
4.010
1
4.200
1
4.210.200
1
4.480
1
4.660
1
5.310
1
7.360
1
7.620
1
Africa, North
1
China
1
European Economic Community countries
1
Germany
1
Grevelingen, Lake
1
Hollande (Pays-Bas)
1
IJssel Lake Polders
1
IJssel Lake Polders (Netherlands)
1
Iceland
1
North Sea
1
Soviet Union
1
Sweden
1
United States
1