Beginning in 1904 he worked as a zoological assistant at the Städtischen Museum für Natur-, Völker- und Handelskunde (Municipal Museum of natural history, ethnology and trade history) in Bremen, under the direction of Hugo Schauinsland (1857-1937).
Ludwig van Beethoven | Ludwig Maximilian University of Munich | Ludwig I of Bavaria | Ludwig Wittgenstein | Ludwig Leichhardt | Marc Cohn | Ludwig Tieck | Ludwig Boltzmann | Ludwig | Christa Ludwig | Ludwig Mies van der Rohe | Marjorie Cohn | Ludwig II of Bavaria | Ludwig Guttmann | Ludwig Feuerbach | Richard Cohn | Ludwig von Mises | Ludwig Senfl | Ludwig Institute for Cancer Research | Ludwig Bemelmans | Harry Cohn | Daniel Cohn-Bendit | Robi Ludwig | Norman Cohn | Ludwig Uhland | Ludwig Traube | Ludwig-Musser | Ludwig Hohlwein | Karl-Ludwig Kratz | Friedrich Ludwig Jahn |