1.
Heikkinen O. Forest expansion in the subalpine zone during the past hundred years, Mount Baker, Washington, U.S.A. ERDKUNDE [Internet]. 1984 Sep. 30 [cited 2024 Oct. 7];38(3):194-202. Available from: https://journals-test.ulb.uni-bonn.de/index.php/erdkunde/article/view/2045