Genre
- Congresses 5 049 bohtosa
- Periodicals 738 bohtosa
- Biography 520 bohtosa
- Juvenile literature 517 bohtosa
- Problems, exercises, etc 300 bohtosa
- Textbooks 260 bohtosa
- Handbooks, manuals, etc 233 bohtosa
- Popular works 232 bohtosa
- Classification 197 bohtosa
- Laboratory manuals 170 bohtosa
- Identification 157 bohtosa
- Dictionaries 143 bohtosa
- Early works to 1800 143 bohtosa
- Pictorial works 130 bohtosa
- Encyclopedias 100 bohtosa
- Tables 100 bohtosa
- Miscellanea 95 bohtosa
- Atlases 82 bohtosa
- Case studies 51 bohtosa
- Nomenclature 47 bohtosa
- Maps 44 bohtosa
- Observations 36 bohtosa
- Anecdotes 35 bohtosa
- Bibliography 34 bohtosa
- Databases 31 bohtosa
- Catalogs 27 bohtosa
- Correspondence 27 bohtosa
- Observers' manuals 24 bohtosa
- Folklore 21 bohtosa
- Charts, diagrams, etc 19 bohtosa
- Terminology 19 bohtosa
- Outlines, syllabi, etc 17 bohtosa
- Abstracts 15 bohtosa
- Study guides 15 bohtosa
- Examinations, questions, etc 14 bohtosa
- History 12 bohtosa
- Interviews 12 bohtosa
- Photographs from space 12 bohtosa
- Sources 12 bohtosa
- Directories 10 bohtosa
- Guidebooks 10 bohtosa
- Pre-Linnean works 10 bohtosa
- Catalogs and collections 9 bohtosa
- Humor 9 bohtosa
- Juvenile fiction 9 bohtosa
- Quotations, maxims, etc 9 bohtosa
- Nomenclature (Popular) 8 bohtosa
- Outdoor books 8 bohtosa
- Indexes 7 bohtosa
- Amateurs' manuals 6 bohtosa more…