Genre
- Congresses 538 canlyniadau
- Handbooks, manuals, etc 66 canlyniadau
- Periodicals 39 canlyniadau
- Problems, exercises, etc 32 canlyniadau
- Textbooks 27 canlyniadau
- Case studies 17 canlyniadau
- Biography 8 canlyniadau
- Dictionaries 8 canlyniadau
- Tables 6 canlyniadau
- Early works to 1800 4 canlyniadau
- Laboratory manuals 4 canlyniadau
- Juvenile literature 3 canlyniadau
- Miscellanea 3 canlyniadau
- Popular works 3 canlyniadau
- Exhibitions 2 canlyniadau
- Juvenile fiction 2 canlyniadau
- Outlines, syllabi, etc 2 canlyniadau
- Sources 2 canlyniadau
- Statistics 2 canlyniadau
- Charts, diagrams, etc 1 canlyniadau
- Constitution 1 canlyniadau
- Correspondence 1 canlyniadau
- Drama 1 canlyniadau
- Electric equipment 1 canlyniadau
- Facsimiles 1 canlyniadau
- Film adaptations 1 canlyniadau
- Forms 1 canlyniadau
- Interviews 1 canlyniadau
- Juvenile sound recordings 1 canlyniadau
- Legends 1 canlyniadau
- Patents 1 canlyniadau
- Personal narratives, New Zealand 1 canlyniadau
- Study guides 1 canlyniadau
- Textbooks for foreign speakers 1 canlyniadau
- Translations into English 1 canlyniadau