Genre
- Electronic books 29,198 canlyniadau
- Congresses 2,152 canlyniadau
- Biography 576 canlyniadau
- Handbooks, manuals, etc 324 canlyniadau
- Textbooks 306 canlyniadau
- Study guides 266 canlyniadau
- Identification 234 canlyniadau
- Problems, exercises, etc 182 canlyniadau
- Popular works 173 canlyniadau
- Classification 120 canlyniadau
- Dictionaries 110 canlyniadau
- Early works to 1800 92 canlyniadau
- Case studies 88 canlyniadau
- Laboratory manuals 82 canlyniadau
- Miscellanea 78 canlyniadau
- Pictorial works 70 canlyniadau
- Atlases 66 canlyniadau
- Anecdotes 46 canlyniadau
- Software 44 canlyniadau
- Examinations, questions, etc 40 canlyniadau
- Encyclopedias 38 canlyniadau
- Interviews 28 canlyniadau
- Observations 28 canlyniadau
- Amateurs' manuals 24 canlyniadau
- Sources 24 canlyniadau
- Periodicals 22 canlyniadau
- Nomenclature 20 canlyniadau
- Observers' manuals 20 canlyniadau
- Périodiques 18 canlyniadau
- Tables 18 canlyniadau
- Statistics 16 canlyniadau
- Terminology 16 canlyniadau
- Correspondence 14 canlyniadau
- Maps 14 canlyniadau
- Outlines, syllabi, etc 12 canlyniadau
- Pre-Linnean works 12 canlyniadau
- Bibliography 10 canlyniadau
- Charts, diagrams, etc 10 canlyniadau
- Folklore 10 canlyniadau
- Guidebooks 10 canlyniadau
- Humor 10 canlyniadau
- Cross-cultural studies 8 canlyniadau
- Outdoor books 8 canlyniadau
- Trials, litigation, etc 8 canlyniadau
- Abstracts 6 canlyniadau
- Catalogs and collections 6 canlyniadau
- Congrès 6 canlyniadau
- Databases 6 canlyniadau
- Fiction 6 canlyniadau
- Glossaries, vocabularies, etc 6 canlyniadau rhagor...