Incoming Resources
- Houghton Mifflin Books for Children/Houghton Mifflin Harcourt, Boston Mass., 2010
- Houghton Mifflin Co., Boston Mass., 2006
- Houghton Mifflin Books for Children, Boston Mass., 2010
- Houghton Mifflin, Boston Mass., 2006
- Houghton Mifflin, Boston Mass., c2006