Genre
- Sources 12 Treffer
- Juvenile literature 9 Treffer
- Archives 3 Treffer
- Exhibitions 3 Treffer
- Problems, exercises, etc 3 Treffer
- Records and correspondence 3 Treffer
- Biography 2 Treffer
- Congresses 2 Treffer
- In art 2 Treffer
- Pictorial works 2 Treffer
- Correspondence 1 Treffer
- Diaries 1 Treffer
- Juvenile poetry 1 Treffer
- Periodicals 1 Treffer
- Poetry 1 Treffer
- Statistics 1 Treffer