Genre
- Electronic books 1 266 bohtosa
- Congresses 74 bohtosa
- Textbooks 52 bohtosa
- Handbooks, manuals, etc 40 bohtosa
- Laboratory manuals 12 bohtosa
- Biography 10 bohtosa
- Dictionaries 10 bohtosa
- Examinations, questions, etc 10 bohtosa
- Popular works 10 bohtosa
- Problems, exercises, etc 10 bohtosa
- Formulae, receipts, prescriptions 4 bohtosa
- Identification 4 bohtosa
- Study guides 4 bohtosa
- Tables 4 bohtosa
- Encyclopedias 2 bohtosa
- Experiments 2 bohtosa
- General 2 bohtosa
- Humor 2 bohtosa
- Interviews 2 bohtosa
- Juvenile literature 2 bohtosa
- Materials 2 bohtosa
- Methods 2 bohtosa
- Nomenclature 2 bohtosa
- Observations 2 bohtosa
- Outlines, syllabi, etc 2 bohtosa
- Patents 2 bohtosa
- Periodicals 2 bohtosa