Genre
- Congresses 53 bohtosa
- Periodicals 18 bohtosa
- Handbooks, manuals, etc 9 bohtosa
- Statistics 7 bohtosa
- Case studies 4 bohtosa
- Directories 4 bohtosa
- Juvenile literature 4 bohtosa
- Bibliography 2 bohtosa
- Databases 2 bohtosa
- Specifications 2 bohtosa
- Catalogs 1 bohtosa
- Fiction 1 bohtosa
- Pictorial works 1 bohtosa
- Readers 1 bohtosa
- Safety regulations 1 bohtosa