Did precipitation regimes change during the Twentieth Century?

Pryor, S. C., Kunkel, K. E., Schoof, J. T. (2009). Did precipitation regimes change during the Twentieth Century?Did precipitation regimes change during the Twentieth Century?, In Understanding Climate Change: Climate Variability, Predictability, and Change in the Midwestern United States, 100-112, Indiana University Press: Bloomington, Indiana