@article{Groenke1991,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Gesetzm{\"a}ßigkeiten in der Biologiedidaktik?},
  isbn      = {3-8142-0418-2},
  year      = {1991},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien},
  isbn      = {3-06-010518-9},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Vorwort, Einleitung},
  isbn      = {3-06-012152-4},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien},
  isbn      = {3-06-010519-7},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Samenpflanzen},
  isbn      = {3-06-010519-7},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien},
  isbn      = {3-06-012152-4},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Samenpflanzen},
  isbn      = {3-06-012152-4},
  year      = {1993},
  language  = {de}
}
@article{Groenke1993,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Samenpflanzen},
  isbn      = {3-06-010518-9},
  year      = {1993},
  language  = {de}
}
@article{Groenke1995,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bericht {\"u}ber die Arbeitsgruppe "Qualifiziert Formenkunde f{\"u}r den Alltag?"},
  isbn      = {3-89088-095-9},
  year      = {1995},
  language  = {de}
}
@book{BergstedtGroenkeMeincke1996,
  author    = {Bergstedt, Christel and Gr{\"o}nke, Ottokar and Meincke, Irmtraut},
  title     = {Biologie : Lehrbuch f{\"u}r Sekundarstufe II ; Gymnasium, Gesamtschule ; Lehrerband mit Kopiervorlagen},
  publisher = {Volk u. Wissen},
  address   = {Berlin},
  isbn      = {3-06-012155-9},
  pages     = {160 S.},
  year      = {1996},
  language  = {de}
}
@article{Groenke1996,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Reiz- und Bewegungsphysiologie},
  isbn      = {3-06-012155-9},
  year      = {1996},
  language  = {de}
}
@article{Groenke1997,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien},
  isbn      = {3-06-010523-5},
  year      = {1997},
  language  = {de}
}
@article{Groenke1997,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien},
  isbn      = {3-06-010522-7},
  year      = {1997},
  language  = {de}
}
@article{Groenke1997,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Samenpflanzen},
  isbn      = {3-06-010523-5},
  year      = {1997},
  language  = {de}
}
@article{Groenke1997,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Symjency},
  isbn      = {3-7420-1115-4},
  year      = {1997},
  language  = {mul}
}
@article{Groenke1997,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Samenpflanzen},
  isbn      = {3-06-010522-7},
  year      = {1997},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010524-3},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-012260-1},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010531-6},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Pflanzenfamilien - {\"U}berschaubare Vielfalt},
  isbn      = {3-06-010562-6},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010563-4},
  year      = {1998},
  language  = {de}
}
@article{GroenkeSchuster1998,
  author    = {Gr{\"o}nke, Ottokar and Schuster, Marianne},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010570-7},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010564-2},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010561-8},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Arbeitstechniken beim Umgang mit Lebewesen},
  year      = {1998},
  language  = {de}
}
@article{Groenke1998,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Bau und Lebensweise von Samenpflanzen},
  isbn      = {3-06-010562-6},
  year      = {1998},
  language  = {de}
}
@article{Groenke1999,
  author    = {Gr{\"o}nke, Ottokar},
  title     = {Reformbestrebungen des Naturgeschichtsunterrichts am Ausgang des 19. Jahrhunderts in Deutschland und der neue Ansatz von Friedrich Junge},
  isbn      = {3-86009-172-7},
  year      = {1999},
  language  = {de}
}
@article{GroenkeKlepel2000,
  author    = {Gr{\"o}nke, Ottokar and Klepel, Gert},
  title     = {Zelle, Einzeller, Vielzeller},
  isbn      = {3-06-010768-8},
  year      = {2000},
  language  = {de}
}