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