7 x 7 Geschichten des Dr. Semper.
By: [Von] R. J. Humm. ([Illustrationen] : Ambrosius Humm.)
Publisher: Domo-Verlag
Published: 1969
Place of publication: Zürich
Language: ger
Number of pages: 172
Other titles: Sieben mal sieben Geschichten des Dr. Semper