Witt, 2010
Z thewoodcraft.org
Witt, David L. Ernest Thompson Seton: the life and legacy of an artist and conservationist. 1rd. Layton, Utah: Gibbs Smith, 2010. USA ISBN 978-1-4236-0391-7.
Witt, David L. Ernest Thompson Seton: the life and legacy of an artist and conservationist. 1rd. Layton, Utah: Gibbs Smith, 2010. USA ISBN 978-1-4236-0391-7.