Adam, Leonhard
Primitive Art / Leonhard Adam
Penguin Books, 1949
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Collingwood, R.G.
The idea of history
Clarendon Press, 1946
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The idea of the city : architectural associations
edited by Robin Middleton
MIT Press, 1996
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Collingwood, R.G.
The idea of history/R.G. Collingwood
A Galaxy Book , 1956
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Schlatter, Richard
Private property: the history of an idea
George Allen & Uwin , 1951
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