Genre
- Congresses 21 Treffer
- Biography 19 Treffer
- Dictionaries 12 Treffer
- Juvenile literature 11 Treffer
- Periodicals 11 Treffer
- Problems, exercises, etc 9 Treffer
- Encyclopedias 4 Treffer
- Bibliography 3 Treffer
- Popular works 3 Treffer
- Textbooks 3 Treffer
- Examinations, questions, etc 2 Treffer
- Interviews 2 Treffer
- Statistics 2 Treffer
- Book reviews 1 Treffer
- Case studies 1 Treffer
- Early works to 1800 1 Treffer
- Handbooks, manuals, etc 1 Treffer
- Humor 1 Treffer
- Miscellanea 1 Treffer
- Quotations, maxims, etc 1 Treffer