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Lea, P.W.; Day, A.: Printed reference material and related information sources (1990)
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Walford's guide to reference material : Vol.1: Science and technology (1999)
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Thorn, G. (Red.): Auswahlliste Informationsbestände in Öffentlichen Bibliotheken : Diskettenausgabe / Freitext-Version (1995)
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Zeitschriftendatenbank (ZDB) - CD-ROM : Ausgabe 2/94; Mit Installationsdiskette und einem Handbuch (1994-)
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¬The reference sources handbook (1996)
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Informationsmittel für Bibliotheken : Laufend kumulierendes Register (1998)
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Informationsmittel für Bibliotheken (IFB) : Besprechungsdienst und Berichte (1997)
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Walford's guide to reference material : Vol.2: Social and historical sciences, philosophy and religion (1998)
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Walford's guide to reference material : Vol.1: Science and technology. 1993. - Vol.2: Social and historical sciences, philosophy and religion. 1994. - Vol.3: Generalia, language and literature, the arts. 1995 (1993-95)
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Informationsdienst an Öffentlichen Bibliotheken der Bundesrepublik Deutschland (1986)
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Katz, W.A.: Introduction to reference work : Vol.1: Basic information sources; vol.2: Reference services and reference processes (1992)
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