Be BerylliumGudrun Bär, Lieselotte Berg, Gerhard Czack, Dieter Gras, Vera Haase, Elisabeth Koch-Bienemann · First published 2013Open the Tome
Mo MolybdenumGerhard Czack, Wolf-Dietrich Fleischmann, Dieter Gras, Vera Haase, Gerhard Kirschstein · First published 1989Open the Tome