Genre
- Problems, exercises, etc 17 canlyniadau
- Juvenile literature 13 canlyniadau
- Case studies 3 canlyniadau
- Handbooks, manuals, etc 3 canlyniadau
- Problems, exercises, etc, 3 canlyniadau
- Congresses 2 canlyniadau
- Audio-visual aids 1 canlyniadau
- Charts, diagrams, etc 1 canlyniadau
- Dictionaries 1 canlyniadau
- Life skills guides 1 canlyniadau
- Textbooks 1 canlyniadau
- Textbooks for foreign speakers 1 canlyniadau