Genre
- Case studies 203 canlyniadau
- Congresses 193 canlyniadau
- Periodicals 62 canlyniadau
- Handbooks, manuals, etc 52 canlyniadau
- Cross-cultural studies 26 canlyniadau
- Textbooks 17 canlyniadau
- Juvenile literature 8 canlyniadau
- Problems, exercises, etc 8 canlyniadau
- Bibliography 5 canlyniadau
- Directories 5 canlyniadau
- Study guides 5 canlyniadau
- Biography 4 canlyniadau
- Dictionaries 4 canlyniadau
- Examinations, questions, etc 4 canlyniadau
- Humor 4 canlyniadau
- Anecdotes 3 canlyniadau
- Databases 3 canlyniadau
- Interviews 3 canlyniadau
- Cases 2 canlyniadau
- Early works to 1800 2 canlyniadau
- Encyclopedias 2 canlyniadau
- Forecasts 2 canlyniadau
- Records and correspondence 2 canlyniadau
- Specifications 2 canlyniadau
- Statistics 2 canlyniadau
- Caricatures and cartoons 1 canlyniadau
- Catalogs 1 canlyniadau
- Classification 1 canlyniadau
- Code numbers 1 canlyniadau
- Curricula 1 canlyniadau
- Decision making 1 canlyniadau
- Fiction 1 canlyniadau
- Juvenile fiction 1 canlyniadau
- Observations 1 canlyniadau
- Popular works 1 canlyniadau
- Quotations 1 canlyniadau
- Regulations 1 canlyniadau
- Software 1 canlyniadau
- Study and teaching (Elementary) 1 canlyniadau
- Terminology 1 canlyniadau
- Terms and phrases 1 canlyniadau
- Timetables 1 canlyniadau
- Video catalogs 1 canlyniadau