The following bibliography has been generated by bringing together all references provided by our content partners. There may be duplication.

References

  • F. A. Ritgen. 1828. Versuch einer natürlichen Eintheilung der Amphibien [Attempt of a natural division of the amphibians]. Verhandlungen der Kaiserlichen Leopoldinisch-Carolinischen Akademie der Naturforscher 14:247-284

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