Allgemeine Grundlagen, Teil 2Karl Bechert, Christian Gerthsen, Arnold Flammersfeld · First published 2020Open the Tome
Allgemeine Grundlagen, 2. TeilKarl Bechert, Christian Gerthsen, Arnold Flammersfeld · First published 1963Open the Tome
Theorie des AtombausKarl Bechert, Christian Gerthsen, Arnold Flammersfeld · First published 1900 · Latest edition 1963Open the Tome