Der Himmelsschlüssel
Subtitle: erbauliche Geschichten.
Publisher: R. Piper
Published: 1965
Place of publication: München
Language: ger
Number of pages: 211
Subjects: Bible -- Philosophy.; Philosophy and religion.; Fables.
Other titles: Dreizehn Fabeln aus dem Königreich Lailonien für gross und klein
Notes: Translation of Klucz Niebieski; albo, Opowiesci budujace z historii swietej zebra ne ku pouczenin i przesprodze, and 13 bajek z Krolestwa Lailonii dla duzych i malych.

Each part has been published separately in Polish.