„Chapter 1: Eastern Maine“. United Divide: A Linear Portrait of the USA/Canada Border. The Center for Land Use Interpretation (winter 2015). 2018-yil 10-dekabrda asl nusxadan arxivlangan. Qaraldi: 2022-yil 6-dekabr.
„Chapter 1: Eastern Maine“. United Divide: A Linear Portrait of the USA/Canada Border. The Center for Land Use Interpretation (winter 2015). 2018-yil 10-dekabrda asl nusxadan arxivlangan. Qaraldi: 2022-yil 6-dekabr.