Incoming Resources
- Houghton Mifflin Harcourt, Boston Mass., 2011
- Houghton Mifflin Books for Children, Boston Mass., 2010
- Houghton Mifflin Co., Boston Mass., c2004
- Houghton Mifflin Harcourt, Boston Mass., 2012, c1974
- Houghton Mifflin, Boston Mass., c2006