Harst, T. H. v. d. (1956). Geology and petrology of the Borga region, Västerbotten, Sweden. Mouton & Co.
Lua i Stíl Chicago (17ú heag.)Harst, Taco Hajo van der. Geology and Petrology of the Borga Region, Västerbotten, Sweden. 'S-Gravenhage: Mouton & Co, 1956.
Lua MLA (8ú heag.)Harst, Taco Hajo van der. Geology and Petrology of the Borga Region, Västerbotten, Sweden. Mouton & Co, 1956.
Rabhadh: Seans nach mbeach na luanna seo go hiomlán cruinn i ngach uile chás.