From Citizendium, the Citizens' Compendium
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- The Commonwealth of Massachusetts
- Massachusetts Historical Society
- USGS real-time, geographic, and other scientific resources of Massachusetts
- Maps of Massachusetts
- 1837 descriptions of Massachusetts cities, towns, mountains, lakes, and rivers, from Hayward's New England Gazetteer.
- Massachusetts State Symbols
- Miscellaneous Massachusetts Facts
- Massachusetts State Facts from USDA
- Massachusetts Constitution and Laws