Amendment 3 summary: Provides for 163 representatives. Reprsentative and Senatorial Districts created by bipartisan commissions. If commissions fail to redistrict then by Missouri Supreme Court Commissioners.
Source for Popular Vote data: Missouri Secretary of State, "Vote on Proposed Constitutional Amendments Numbers 1, 2, and 3 at Special Election held January 14th, 1966," Missouri Manual, 1967-1968 (Jefferson City, 1966)