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Rigobello, Armando
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Bosio, Franco <1938- >
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Derossi, Giorgio <1938- >
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Popper, Karl R.
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Lugarini, Leo
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Popper, Karl R.
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Popper, Karl R.
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Popper, Karl R.
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Bartley, William Warren
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Warnock, Geoffrey James
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Gilkey, Langdon <1919-2004>
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Colloque de l'Académie Internationale des Sciences <1970 ; Ginevra>
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Wittgenstein, Ludwig
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