Visualisierung Sozialer NetzwerkeRoger Häußling, Betina Hollstein, Katja Mayer · First published 2022Open the Tome
Western and Northern Europe 1940-June 1942Katja Happe, Michael Mayer, Maja Peers, Jean-Marc Dreyfus, Caroline Pearce · First published 2021Open the Tome
Nachhaltigkeit : 125 Fragen und AntwortenKatja Mayer · First published 2017 · Latest edition 2020Open the Tome
Current Challenges in Patent Information RetrievalMihai Lupu, Katja Mayer, Noriko Kando, Anthony J. Trippe · First published 2017Open the Tome
West- und Nordeuropa 1940 - Juni 1942Katja Happe, Michael Mayer, Maja Peers, Jean-Marc Dreyfus · First published 2013Open the Tome
