Jahresbericht 1999 - Biologische Station im Kreis Wesel e.V. (BSKW)

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Anzahl
1.000
900
800
700
600
500
400
300
200
100
0
11-1
11-2
11-3
12-1
12-2
12-3
1-1
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1-2
Dekade
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9EJAH ''&''
1-3
2-1
2-2
2-3
3-1
3-2
3-3