Incoming Resources
- Houghton Mifflin Co., Boston and New York, 1933
- Houghton Mifflin company, Boston and New York, 1915
- Houghton Mifflin company, Boston and New York, 1921
- Houghton Mifflin company, Boston and New York, 1909
- Houghton Mifflin Co., Boston and New York, 1927