Genre
- Textbooks 15 canlyniadau
- Problems, exercises, etc 10 canlyniadau
- Case studies 9 canlyniadau
- Handbooks, manuals, etc 6 canlyniadau
- Laboratory manuals 3 canlyniadau
- Cases 2 canlyniadau
- Biography 1 canlyniadau
- Congresses 1 canlyniadau
- Studies and exercises 1 canlyniadau
- Style manuals 1 canlyniadau
- Textbooks for foreign speakers 1 canlyniadau