Source for Popular Vote data: North Dakota Secretary of State. Official Abstract of Consolidated Ballot Votes Cast at the Special State Wide Election Held June 28, 1960, North Dakota Secretary of State (https://vip.sos.nd.gov/pdfs/Abstracts%20by%20Year%5C1960s'%20Election%20Results%5C1960%5CSpecial%20Election%2006-28-1960) (accessed 23 May 2016)