Photograph of Vilhelm Grønbech
Unknown author<span style="display: none;">Unknown author</span>
Stefánsson, Finn (17 July 2011). "<a rel="nofollow" class="external text" href="https://mytologi.lex.dk/Vilhelm_Gr%C3%B8nbech">Vilhelm Grønbech</a>". Nordisk Mytologi (in Danish). Retrieved September 3, 2020.