Genre
- Cases 31 canlyniadau
- Problems, exercises, etc 6 canlyniadau
- Forms 5 canlyniadau
- Congresses 4 canlyniadau
- Examinations, questions, etc 2 canlyniadau
- Bibliography 1 canlyniadau
- Cross-cultural studies 1 canlyniadau
- Databases 1 canlyniadau
- Handbooks, manuals, etc 1 canlyniadau
- History 1 canlyniadau
- Textbooks 1 canlyniadau