Actually I really hate the politics on the Spiegel-Gutenberg page not to allow a complete download. So it's good to find at gutenberg.net at least some very interesting things in German. E.g. the complete history of Rome from Mommsen.
large groups of people are smarter than an elite few, no matter how brilliant—better at solving problems, fostering innovation, coming to wise decisions, even predicting the future
xISBN is a library web service that supplies International Standard Book Numbers (ISBNs) associated with individual intellectual works represented in the OCLC WorldCat database. Give it an ISBN, and it returns a list of associated ISBNs.
A. Hotho, R. Jäschke, C. Schmitz, и G. Stumme. Proceedings of the First Conceptual Structures Tool Interoperability Workshop at the 14th International Conference on Conceptual Structures, стр. 87-102. Aalborg, Aalborg Universitetsforlag, (2006)