Source for Popular Vote data: North Dakota Secretary of State. North Dakota Official Abstract of Votes Cast at the General Election Held November 3, 1970, North Dakota Secretary of State (https://vip.sos.nd.gov/pdfs/Abstracts%20by%20Year%5C1970s'%20Election%20Results%5C1970%5CGeneral%20Election%2011-03-1970) (accessed 19 May 2016)