Special issue: “Upgrading the eLibrary: enhanced information services driven by technology and economics” – Proceedings of the 9th International Bielefeld Conference, 3–5 February 2009, Bielefeld, Germany
Höppner, M., Horstmann, W., & Rahmsdorf, S. (Eds.). (2009). Special issue: “Upgrading the eLibrary: enhanced information services driven by technology and economics” – Proceedings of the 9th International Bielefeld Conference, 3–5 February 2009, Bielefeld, Germany. Library Hi Tech, 27(4).