Genre
- Congresses 34 Treffer
- Case studies 23 Treffer
- Cross-cultural studies 19 Treffer
- Longitudinal studies 8 Treffer
- Handbooks, manuals, etc 7 Treffer
- Biography 6 Treffer
- Textbooks 6 Treffer
- Encyclopedias 5 Treffer
- Life skills guides 4 Treffer
- Juvenile literature 3 Treffer
- Abstracts 1 Treffer
- Autobiographies 1 Treffer
- Autobiography 1 Treffer
- Biographies 1 Treffer
- Caricatures and cartoons 1 Treffer
- Interviews 1 Treffer
- Juveniile literature 1 Treffer
- Popular Work 1 Treffer
- Problems, exercises, etc 1 Treffer
- Psychology 1 Treffer
- Social sciences 1 Treffer
- Sources 1 Treffer
- collective biographies 1 Treffer