Andreas Ersson Library

By Dr. Dernburg (auth.)

By G. Demnick-Klas, D. Fricke, H. P. Wibbing (auth.), Dr. med. Otfrid P. Schaefer (eds.)

By Wilhelm Deichmann (auth.)

By Dr.-Ing. G. Wagner (auth.)

By Max Schneider

By ERICH GUTENBERG

By Eugen Bleuler (auth.)

By Fritz Krauss

By Dipl.-Physiker Karl Sellier (auth.)

By A. von Domarus