Genre
- Electronic books 29.198 Treffer
- Congresses 2.152 Treffer
- Biography 576 Treffer
- Handbooks, manuals, etc 324 Treffer
- Textbooks 306 Treffer
- Study guides 266 Treffer
- Identification 234 Treffer
- Problems, exercises, etc 182 Treffer
- Popular works 173 Treffer
- Classification 120 Treffer
- Dictionaries 110 Treffer
- Early works to 1800 92 Treffer
- Case studies 88 Treffer
- Laboratory manuals 82 Treffer
- Miscellanea 78 Treffer
- Pictorial works 70 Treffer
- Atlases 66 Treffer
- Anecdotes 46 Treffer
- Software 44 Treffer
- Examinations, questions, etc 40 Treffer
- Encyclopedias 38 Treffer
- Interviews 28 Treffer
- Observations 28 Treffer
- Amateurs' manuals 24 Treffer
- Sources 24 Treffer
- Periodicals 22 Treffer
- Nomenclature 20 Treffer
- Observers' manuals 20 Treffer
- Périodiques 18 Treffer
- Tables 18 Treffer
- Statistics 16 Treffer
- Terminology 16 Treffer
- Correspondence 14 Treffer
- Maps 14 Treffer
- Outlines, syllabi, etc 12 Treffer
- Pre-Linnean works 12 Treffer
- Bibliography 10 Treffer
- Charts, diagrams, etc 10 Treffer
- Folklore 10 Treffer
- Guidebooks 10 Treffer
- Humor 10 Treffer
- Cross-cultural studies 8 Treffer
- Outdoor books 8 Treffer
- Trials, litigation, etc 8 Treffer
- Abstracts 6 Treffer
- Catalogs and collections 6 Treffer
- Congrès 6 Treffer
- Databases 6 Treffer
- Fiction 6 Treffer
- Glossaries, vocabularies, etc 6 Treffer mehr …