Household economy at Wall Ridge : a fourteenth-century Central Plains farmstead in the Missouri Valley - Lensink, Stephen C.; Schermer, Shirley J., 1946-; Tiffany, Joseph A., 1948- (The University of Utah Press, 2020)
"The Wall Ridge site was discovered in 1983 during an archaeological survey for a road project in Mills County, Iowa"--Chapter 2, Site context.