Genre
- Sources 25 canlyniadau
- Congresses 15 canlyniadau
- Biography 12 canlyniadau
- Early works to 1800 8 canlyniadau
- Translations into English 6 canlyniadau
- Encyclopedias 3 canlyniadau
- Dictionaries 2 canlyniadau
- Atlases 1 canlyniadau
- Bibliography 1 canlyniadau
- Case studies 1 canlyniadau
- Catalogs 1 canlyniadau
- Correspondence 1 canlyniadau
- Facsimiles 1 canlyniadau
- Facsimilies 1 canlyniadau
- Fiction 1 canlyniadau
- Genealogy 1 canlyniadau
- Historiography 1 canlyniadau
- Juvenile literature 1 canlyniadau
- Maps 1 canlyniadau
- Periodicals 1 canlyniadau
- Poetry 1 canlyniadau
- Scores 1 canlyniadau
- Trials, litigation, etc 1 canlyniadau