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Grogan, D.: More case studies in reference work (1972)
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Thun, H.-P.: "At your fingertip"? : Auskunfts- und Informationsdienst bei uns noch Entwicklungsland (1970)
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- Source
- Bücherei und Bildung. 22(1970), S.63-71
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Grogan, D.: Practical reference work (1979)
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