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11Published: Braunschweig | Georg-Eckert-Inst. | 1988Book
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12Published: Braunschweig | Georg-Eckert-Inst. | 1983Book
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13Published: Stuttgart | Dt. Verl.-Anst. | 1975Book
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14
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15Published: Braunschweig | Georg-Eckert-Inst. | 1986Book
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16Published: Essen | Klartext | 2005Book
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17Published: Hannover | Niedersächs. Landeszent. für polit. Bildung | 1995Book