Click on these dates to see which parties made up New Zealand's Parliament from 1918 (when the first Labour Party MPs entered Parliament) to 1935 (when Labour first formed the government).
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Sources: Dieter Nohlen, Florian Grotz, and Christof Hartmann, Elections in Asia and the Pacific: a data handbook. Oxford: Oxford University Press, 2001, p. 731–734; New Zealand Election Results