Genre
- Congresses 380 Treffer
- Periodicals 56 Treffer
- Handbooks, manuals, etc 44 Treffer
- Encyclopedias 34 Treffer
- Dictionaries 16 Treffer
- Case studies 13 Treffer
- Textbooks 9 Treffer
- Atlases 8 Treffer
- Databases 7 Treffer
- Classification 6 Treffer
- Biography 5 Treffer
- Problems, exercises, etc 5 Treffer
- Cross-cultural studies 4 Treffer
- Laboratory manuals 3 Treffer
- Nomenclature 3 Treffer
- Tables 3 Treffer
- Abstracts 2 Treffer
- Bibliography 2 Treffer
- Indexes 2 Treffer
- Pictorial works 2 Treffer
- Statistical methods 2 Treffer
- Study guides 2 Treffer
- Amateurs' manuals 1 Treffer
- Anecdotes 1 Treffer
- Cases 1 Treffer
- Directories 1 Treffer
- Early works to 1800 1 Treffer
- Experiments 1 Treffer
- Juvenile literature 1 Treffer
- Maps 1 Treffer
- Miscellanea 1 Treffer
- Polyglot 1 Treffer
- Popular works 1 Treffer
- Sources 1 Treffer
- Specimens 1 Treffer
- Statistics 1 Treffer
- Terminology 1 Treffer