Cohas Brook rises in Auburn, New Hampshire, north of Calef Pond. The brook follows a winding course westward to the Merrimack River in Manchester. In Manchester it picks up the outlet of Massabesic Lake, the water supply for the city. This lower portion was formerly known as Coos River.
- New Hampshire GRANIT state geographic information system
- Morse, Jedidiah; "The American Gazetteer", Thomson & Andrews, 1810
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