Marshall, James Vance. Walkabout. New York: Morrow, 1971. Print.
Big History Project, n.d. Web. 22 Mar. 2013. <https://course.bighistoryproject.com>.
All pictures on our website do not belong to us. Credit goes to all respectful owners of the photos.
Big History Project, n.d. Web. 22 Mar. 2013. <https://course.bighistoryproject.com>.
All pictures on our website do not belong to us. Credit goes to all respectful owners of the photos.