1.
Olufsen O. Proceedings of the National Park Conference 1915. Glimpses of our National Parks 1916. Forests of Mount Rainier National Park 1916. Features of the Flora of Mount Rainier National Park 1916. Forests of Yosemite Sequoia, and General Grant National Parks 1916. gt [Internet]. 1. januar 1916 [henvist 20. december 2024];23. Tilgængelig hos: https://tidsskrift.dk/geografisktidsskrift/article/view/46922