Nester, W. R. (2011). From mountain man to millionaire: The bold and dashing life of Robert Campbell (Rev. and expanded ed.). University of Missouri Press.

Nester, William R. From Mountain Man to Millionaire: The Bold and Dashing Life of Robert Campbell. Rev. and expanded ed. Columbia, Mo.: University of Missouri Press, 2011.

Nester, William R. From Mountain Man to Millionaire: The Bold and Dashing Life of Robert Campbell. Rev. and expanded ed. University of Missouri Press, 2011.