5 books in series

Professors Zwillinge

Professors Zwillinge is a 5-book series with 5 released primary works first released in 1923 with contributions by Else Ury.

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Professors Zwillinge

Cover 6

Professors Zwillinge in der Waldschule

Cover 6

Professors Zwillinge in Italien

Cover 5

Professors Zwillinge im Sternenhaus

Cover 6

Professors Zwillinge, Von der Schulbank ins Leben