1
per Downton, James V.
New York : Holt, Rinehart and Winston, 1971
New York : Holt, Rinehart and Winston, 1971
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Llibre
2
per Downton, James V.
New York, New York : Free Press, 1973
New York, New York : Free Press, 1973
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Llibre
3
per Downton, James V.
Boulder, Colo. : Westview Press, 1997
Boulder, Colo. : Westview Press, 1997
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Llibre
4
per Downton, James V.
New York, Free Press 1973
New York, Free Press 1973
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Llibre
5
per Downton, James V.
New York : Columbia University Press, 1979
New York : Columbia University Press, 1979
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Llibre
6
per Downton, James V.
New York : Columbia University Press, 1979
New York : Columbia University Press, 1979
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Llibre
7