This is a photograph of a paper-based library card catalog. More particularly, it is the "subject catalogue ("Schlagwortkatalog") of the University Library of Graz [Austria]. The card shown refers to a text by Hans Schleimer who made up the rules for this catalogue." This photograph was taken by Dr. Marcus Gossler on 2005-12-29. It is licensed under the Creative Commons Attribution-ShareAlike 3.0 Unported license (please note that it is not public domain). It is available on Wikimedia Commons at: https://commons.wikimedia.org/wiki/File:Schlagwortkatalog.jpg
