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Hartmann, K.: Pressedatenbank: Online-Retrieval und gedruckte Register (1984)
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Hartmann, K.: PDS: Retrievalsoftware für die Pressedatenbank (1984)
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Hartmann, K.; Lienau, H.-J.: Gruner & Jahr press data bank : first experiences of the usage of optical disc storage technology (MEGADOC) for a large archive (1986)
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