Genre
- Periodicals 351 canlyniadau
- Congresses 304 canlyniadau
- Handbooks, manuals, etc 139 canlyniadau
- Case studies 86 canlyniadau
- Bibliography 42 canlyniadau
- Cross-cultural studies 23 canlyniadau
- Statistical methods 23 canlyniadau
- Biography 21 canlyniadau
- Juvenile literature 17 canlyniadau
- Textbooks 15 canlyniadau
- Maps 13 canlyniadau
- Directories 10 canlyniadau
- Statistics 10 canlyniadau
- Longitudinal studies 9 canlyniadau
- Sources 9 canlyniadau
- Problems, exercises, etc 8 canlyniadau
- Databases 7 canlyniadau
- Encyclopedias 6 canlyniadau
- Laboratory manuals 6 canlyniadau
- Observations 6 canlyniadau
- Dictionaries 5 canlyniadau
- Popular works 5 canlyniadau
- Miscellanea 4 canlyniadau
- Style manuals 4 canlyniadau
- Indexes 3 canlyniadau
- Abstracts 2 canlyniadau
- Catalogs 2 canlyniadau
- Classification 2 canlyniadau
- Drama 2 canlyniadau
- Genealogy 2 canlyniadau
- Pictorial works 2 canlyniadau
- Specifications 2 canlyniadau
- Anecdotes 1 canlyniadau
- Cases 1 canlyniadau
- Charts, diagrams, etc 1 canlyniadau
- Chronology 1 canlyniadau
- Curricula 1 canlyniadau
- Designs and plans 1 canlyniadau
- Electronic information resources 1 canlyniadau
- Fiction 1 canlyniadau
- Handbooks, manual, etc 1 canlyniadau
- Humor 1 canlyniadau
- In art 1 canlyniadau
- Interviews 1 canlyniadau
- Juvenile fiction 1 canlyniadau
- Manuscripts 1 canlyniadau
- Personal narratives 1 canlyniadau
- Study and teaching 1 canlyniadau
- Study guides 1 canlyniadau
- Terms and phrases 1 canlyniadau rhagor...