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Sewell, W.R. Derrick, Coppock, J.T.. (1977). Public participation in planning . New York: John Wiley.

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Sewell, W.R. Derrick, Coppock, J.T.. Public participation in planning. New York: John Wiley, 1977. Text.

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Sewell, W.R. Derrick, Coppock, J.T.. Public participation in planning. New York: John Wiley, 1977. Text.

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Sewell, W.R. Derrick, Coppock, J.T.. Public participation in planning. New York: John Wiley, 1977. Print.