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1Published: Braunschweig | Georg-Eckert-Inst. | 1989Book
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2Published: Braunschweig | Georg-Eckert-Inst. | [ca 1980]Book
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3Published: Braunschweig | Georg-Eckert-Inst. | 1991Book
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4Published: Braunschweig | Georg-Eckert-Inst. | 1988Book
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5Published: Braunschweig | Georg-Eckert-Inst. | 1982Book