Genre
- Electronic books 21 598 bohtosa
- Congresses 2 216 bohtosa
- Handbooks, manuals, etc 619 bohtosa
- Biography 205 bohtosa
- Case studies 144 bohtosa
- Pictorial works 68 bohtosa
- Study guides 68 bohtosa
- Textbooks 56 bohtosa
- Dictionaries 44 bohtosa
- Problems, exercises, etc 40 bohtosa
- Popular works 34 bohtosa
- Software 30 bohtosa
- Specifications 28 bohtosa
- Interviews 24 bohtosa
- Amateurs' manuals 22 bohtosa
- Encyclopedias 20 bohtosa
- Laboratory manuals 20 bohtosa
- Terminology 18 bohtosa
- Anecdotes 16 bohtosa
- Archives 14 bohtosa
- Exhibitions 14 bohtosa
- Formulae 14 bohtosa
- Examinations, questions, etc 12 bohtosa
- Periodicals 10 bohtosa
- Abstracts 8 bohtosa
- Catalogs 8 bohtosa
- Directories 8 bohtosa
- Portraits 8 bohtosa
- Drawings 6 bohtosa
- Early works to 1800 6 bohtosa
- Formulae, receipts, prescriptions 6 bohtosa
- Patents 6 bohtosa
- Sources 6 bohtosa
- Statistics 6 bohtosa
- Cartoon 4 bohtosa
- Citizen participation 4 bohtosa
- Classification 4 bohtosa
- Correspondence 4 bohtosa
- Cross-cultural studies 4 bohtosa
- Guidebooks 4 bohtosa
- Identification 4 bohtosa
- Rules and practice 4 bohtosa
- Tables 4 bohtosa
- Textbooks for foreign speakers 4 bohtosa
- Translations into English 4 bohtosa
- Address list 2 bohtosa
- Addresses, essays, lectures 2 bohtosa
- Atlases 2 bohtosa
- Bibliography 2 bohtosa
- Blogs 2 bohtosa more…