Genre
- Periodicals 24 bohtosa
- Congresses 15 bohtosa
- Handbooks, manuals, etc 13 bohtosa
- Biography 10 bohtosa
- Tables 7 bohtosa
- Dictionaries 5 bohtosa
- Classification 4 bohtosa
- Problems, exercises, etc 4 bohtosa
- Popular works 3 bohtosa
- Remote-sensing images 3 bohtosa
- Atlases 2 bohtosa
- Pictorial works 2 bohtosa
- Anecdotes 1 bohtosa
- Bibliography 1 bohtosa
- Case studies 1 bohtosa
- Catalogs 1 bohtosa
- Charts, diagrams, etc 1 bohtosa
- Computer programs 1 bohtosa
- Correspondence 1 bohtosa
- Directories 1 bohtosa
- Early works to 1800 1 bohtosa
- Encyclopedias 1 bohtosa
- Examinations, questions, etc 1 bohtosa
- Exhibitions 1 bohtosa
- Gazetteers 1 bohtosa
- Laboratory manuals 1 bohtosa
- Maps 1 bohtosa
- Miscellanea 1 bohtosa
- Observers' manuals 1 bohtosa
- Pre-Linnean works 1 bohtosa
- Remote-sensing maps 1 bohtosa
- Terminology 1 bohtosa
- Textbooks 1 bohtosa