Genre
- Juvenile fiction 18 canlyniadau
- Congresses 8 canlyniadau
- Handbooks, manuals, etc 7 canlyniadau
- Computer games 3 canlyniadau
- Case studies 2 canlyniadau
- Exhibitions 2 canlyniadau
- Bibliography 1 canlyniadau
- Biography 1 canlyniadau
- Dictionaries 1 canlyniadau
- Encyclopedias 1 canlyniadau
- Humor 1 canlyniadau
- Juvenile literature 1 canlyniadau
- Juvenile sound recordings 1 canlyniadau
- Pictorial works 1 canlyniadau
- Readers 1 canlyniadau
- Statistics 1 canlyniadau
- Vocational guidance 1 canlyniadau