Genre
- Congresses 2,331 canlyniadau
- Handbooks, manuals, etc 574 canlyniadau
- Periodicals 428 canlyniadau
- Exhibitions 316 canlyniadau
- Pictorial works 202 canlyniadau
- Biography 200 canlyniadau
- Juvenile literature 138 canlyniadau
- Case studies 106 canlyniadau
- Problems, exercises, etc 68 canlyniadau
- Textbooks 63 canlyniadau
- Dictionaries 58 canlyniadau
- Catalogs 57 canlyniadau
- Tables 42 canlyniadau
- Encyclopedias 37 canlyniadau
- Portraits 37 canlyniadau
- Popular works 28 canlyniadau
- Interviews 26 canlyniadau
- Directories 25 canlyniadau
- Statistics 19 canlyniadau
- Specifications 18 canlyniadau
- Amateurs' manuals 17 canlyniadau
- Laboratory manuals 14 canlyniadau
- Bibliography 12 canlyniadau
- Guidebooks 7 canlyniadau
- Study guides 7 canlyniadau
- Cross-cultural studies 6 canlyniadau
- Miscellanea 6 canlyniadau
- Abstracts 5 canlyniadau
- Terminology 5 canlyniadau
- Anecdotes 4 canlyniadau
- Databases 4 canlyniadau
- Forecasts 4 canlyniadau
- History 4 canlyniadau
- Acronyms 3 canlyniadau
- Catalogues raisonnés 3 canlyniadau
- Charts, diagrams, etc 3 canlyniadau
- Classification 3 canlyniadau
- Designs and plans 3 canlyniadau
- Drawings 3 canlyniadau
- Early works to 1800 3 canlyniadau
- Indexes 3 canlyniadau
- Sources 3 canlyniadau
- Textbooks for foreign speakers 3 canlyniadau
- Conversion tables 2 canlyniadau
- Formulae 2 canlyniadau
- Formulae, receipts, prescriptions 2 canlyniadau
- Musical settings 2 canlyniadau
- Observations 2 canlyniadau
- Patents 2 canlyniadau
- Patterns 2 canlyniadau rhagor...