[S206] History of Delaware County, Iowa and its People, edited by John F. Merry; 2 volumes (Chicago: S. J. Clarke Publishing Company, 1914), vol. 2, pages 121-122.
Biographical sketch of Samuel Wesley Klaus. "Mr. Klaus was married in 1897 to Miss Rose Landis, who was born in this county, a daughter of A. B. and Elizabeth (McDonald) Landis, both of whom survive."