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1Published 1991“...Abstract series (Astronomische Gesellschaft (Germany : West)) ;...”
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2Published 1990“...Abstract series (Astronomische Gesellschaft (Germany : West)) ;...”
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3Published 1990“...Abstract series (Astronomische Gesellschaft (Germany : West)) ;...”
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4Published 1989“...Abstract series (Astronomische Gesellschaft (Germany : West)) ;...”
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