A New Zealand based study published by the ACM White, H., Wright, T., and Chawner, B. 2006. Usability evaluation of library online catalogues. In Proceedings of the 7th Australasian User interface Conference - Volume 50 (Hobart, Australia, January 16 - 19, 2006). W. Piekarski, Ed. ACM International Conference Proceeding Series, vol. 169. Australian Computer Society, Darlinghurst, Australia, 69-72. Money quote from abstract: "The evaluation found severe usability problems with online catalogues--we found so many problems we were forced to use a card sorting technique to understand and classify the problems."