Easton, David
A systems analysis of political life
John Wiley & Sons, 1965
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Maor
Political Parties & Party Systems
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Eisenstadt, Shmuel Noah
The Political systems of empires
Free Press, 1967
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Political systems and the distribution of power
edited by Michael Banton
Tavistock Publications, 1972
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Modern political systems: Asia
editors, Robert E. Ward and Roy C. Macridis
Prentice-Hall, 1963
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