Fig. 61.—Upper figure, European Bison (Bison bonasus).
William Berryman Scott
<a class="external free" href="https://en.wikisource.org/wiki/Page:A_History_of_Land_Mammals_in_the_Western_Hemisphere.djvu/178">https://en.wikisource.org/wiki/Page:A_History_of_Land_Mammals_in_the_Western_Hemisphere.djvu/178</a>, page 154