Hamilton, H. D. (1964). Legislative apportionment key to power. Harper & Row.
Tohutoru Kātū Chicago (17th ed.)Hamilton, Howard D. Legislative Apportionment Key to Power. Nueva York: Harper & Row, 1964.
Tohutoro MLA (9th ed.)Hamilton, Howard D. Legislative Apportionment Key to Power. Harper & Row, 1964.
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