1
Published: 1994
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2
by Lindblom, Charles E.
Published: [1995]
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3
Published: 1999
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4
by Bihari Mihály (1943-)
Published: 2004, cop. 1992
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5
6
7
by Sartori, Giovanni (1924-)
Published: 1999
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8
Published: 2004
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