Incoming Resources
- Houghton Mifflin Company, Boston and New York, 1924
- Houghton, Mifflin and company, Boston and New York, 1892
- Houghton Mifflin company, Boston and New York, 1925
- Houghton, Mifflin and company, Boston and New York, 1864
- Houghton Mifflin company, Boston and New York, 1930