D. Minnesota July 1969 casesBarrett v. United StatesMitchell v. DonovanWashington Scientific Indus., Inc. v. Polan Indus.Baughman v. United StatesWilliams v. United StatesArcher Daniels Midland Company v. United StatesAhola v. United StatesOwatonna Mfg. Co. v. Melroe Co.United States v. KrizOlson v. Regents of University of MinnesotaVocational Personnel Services, Inc. v. Statistical Tabulating Corp.