Genre
- Archives 26 Treffer
- Juvenile fiction 25 Treffer
- Biography 12 Treffer
- Periodicals 8 Treffer
- Pictorial works 4 Treffer
- Directories 3 Treffer
- Records and correspondence 3 Treffer
- Sources 3 Treffer
- Congresses 2 Treffer
- Correspondence 2 Treffer
- Identification 2 Treffer
- Juvenile literature 2 Treffer
- Bibliography 1 Treffer
- Case studies 1 Treffer
- Catalogs 1 Treffer
- Catalogs and collections 1 Treffer
- Fiction 1 Treffer
- Genealogy 1 Treffer
- Interviews 1 Treffer
- Maps 1 Treffer
- Statistics 1 Treffer
- Union lists 1 Treffer