Genre
- Case studies 71 canlyniadau
- Handbooks, manuals, etc 27 canlyniadau
- Congresses 17 canlyniadau
- Textbooks 13 canlyniadau
- Cross-cultural studies 12 canlyniadau
- Periodicals 11 canlyniadau
- Biography 5 canlyniadau
- Popular works 5 canlyniadau
- Longitudinal studies 4 canlyniadau
- Bibliography 3 canlyniadau
- Databases 3 canlyniadau
- Interviews 3 canlyniadau
- Style manuals 3 canlyniadau
- Dictionaries 2 canlyniadau
- Encyclopedias 2 canlyniadau
- Indexes 2 canlyniadau
- Problems, exercises, etc 2 canlyniadau
- Abstracts 1 canlyniadau
- Aids and devices 1 canlyniadau
- Anecdotes 1 canlyniadau
- Cases 1 canlyniadau
- Drama 1 canlyniadau
- Fiction 1 canlyniadau
- Guidebooks 1 canlyniadau
- Handbook, manuals, etc 1 canlyniadau
- Learning, Psychology of 1 canlyniadau
- Mental health 1 canlyniadau
- Pictorial works 1 canlyniadau
- Psychological aspects 1 canlyniadau
- Reviews 1 canlyniadau
- Sources 1 canlyniadau
- Terminology 1 canlyniadau
- Terms and phrases 1 canlyniadau
- Use studies 1 canlyniadau