Publishers
- Y. Lolfa 1
- Y. Lolfa Cyf. 1
- Yale Centre For British Art 1
- Yale University Press 52
- Yarrow And Company 1
- Yearling Books 1
- Yeoman Publishing 1
- Yerba Seca Publications 1
- York Archaeological Trust 1
- Yorkshire Archaeological Society 1
- Yorkshire Naturalists' union 2
- Yorkshire Sculpture Park 1
- Young World Productions 4
- Youth Book Club Ltd. 1
- Ystalyfera 1