NORTHWESTERN CEMENT CO. v. MINN.. The Oyez Project at IIT Chicago-Kent College of Law. 17 May 2012. <http://www.oyez.org/cases/1950-1959/1958/1958_12>.
NORTHWESTERN CEMENT CO. v. MINN., The Oyez Project at IIT Chicago-Kent College of Law, http://www.oyez.org/cases/1950-1959/1958/1958_12 (last visited May 17, 2012).
"NORTHWESTERN CEMENT CO. v. MINN.," The Oyez Project at IIT Chicago-Kent College of Law, accessed May 17, 2012, http://www.oyez.org/cases/1950-1959/1958/1958_12.