Genre
- Congresses 127 canlyniadau
- Periodicals 47 canlyniadau
- Handbooks, manuals, etc 11 canlyniadau
- Juvenile literature 6 canlyniadau
- Case studies 5 canlyniadau
- Problems, exercises, etc 3 canlyniadau
- Statistics 3 canlyniadau
- Cross-cultural studies 2 canlyniadau
- Dictionaries 2 canlyniadau
- Acronyms 1 canlyniadau
- Biography 1 canlyniadau
- Cases 1 canlyniadau
- Databases 1 canlyniadau
- Directories 1 canlyniadau
- Popular works 1 canlyniadau
- Study guides 1 canlyniadau