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Thun, H.-P.: ¬Der Informationsdienst der Öffentlichen Bibliothek (1971) 0.03

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Source: Informationszentrum Öffentliche Bibliothek I

Thun, H.-P.: "At your fingertip"? : Auskunfts- und Informationsdienst bei uns noch Entwicklungsland (1970) 0.03

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Source: Bücherei und Bildung. 22(1970), S.63-71

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