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Year of Publication 07.02.1991

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Year of Publication 30.09.1990

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Year of Publication 23.04.1982

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Year of Publication 15.01.1982

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Year of Publication 25.01.1979

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Year of Publication 15.10.1983

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Year of Publication 15.08.1981

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Year of Publication 15.08.1981

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Year of Publication 07.07.1980

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Year of Publication 07.06.1988

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Year of Publication 15.08.1977

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Year of Publication 23.08.1984

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Year of Publication 30.03.1986

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Year of Publication 23.01.1984

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Year of Publication 23.08.1982

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Year of Publication 15.02.1981