HEIKKINEN, O. Forest expansion in the subalpine zone during the past hundred years, Mount Baker, Washington, U.S.A. ERDKUNDE, [S. l.], v. 38, n. 3, p. 194–202, 1984. DOI: 10.3112/erdkunde.1984.03.05. Disponível em: https://www.erdkunde.uni-bonn.de/article/view/2045. Acesso em: 30 apr. 2025.