"Chapter 1: Eastern Maine". United Divide: A Linear Portrait of the USA/Canada Border. The Center for Land Use Interpretation. Winter 2015. Archived from the original on 2018-12-10. Retrieved 2017-11-14.
"Chapter 1: Eastern Maine". United Divide: A Linear Portrait of the USA/Canada Border. The Center for Land Use Interpretation. Winter 2015. Archived from the original on 2018-12-10. Retrieved 2017-11-14.