This image is a derivative work of the following images: File:Bison_skull_pile.jpg licensed with PD-US 2011-02-09T23:51:10Z Kaldari 5689x4448 (2473795...
Derived from File:Bison skull pile edit.jpg I, the copyright holder of this work, hereby publish it under the following license: This file is licensed...
DescriptionBison skull pile.jpg English: 1892: bison skulls await industrial processing at Michigan Carbon Works in Rogueville (a suburb of Detroit). Bones...
DescriptionBison skull pile-restored.jpg English: Photograph 1892 of a pile of American bison skulls waiting to be ground for fertilizer. Date circa 1892...
DescriptionBison skull pile sepia.jpg English: Photograph from the mid-1870s of a pile of American bison skulls waiting to be ground for fertilizer Date...
