Genre
- Congresses 106 bohtosa
- Handbooks, manuals, etc 22 bohtosa
- Periodicals 10 bohtosa
- Encyclopedias 4 bohtosa
- Biography 3 bohtosa
- Textbooks 3 bohtosa
- Atlases 2 bohtosa
- Catalogs 2 bohtosa
- Dictionaries 2 bohtosa
- Juvenile literature 2 bohtosa
- Miscellanea 2 bohtosa
- Problems, exercises, etc 2 bohtosa
- Anecdotes 1 bohtosa
- Archives 1 bohtosa
- Case studies 1 bohtosa
- Charts, diagrams, etc 1 bohtosa
- Maps 1 bohtosa
- Observations 1 bohtosa
- Outlines, syllabi, etc 1 bohtosa
- Popular works 1 bohtosa
- Statistics 1 bohtosa