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Rada Juan : The impact of micro-electronics : a tentative appraisal of information technology.
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Rada Martin De : South China in the 16th century : being the narratives of Galeote Pereira, Gaspar da Cruz, Martin de Rada (1550-1575) / edited by C.R. Boxer.
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Radal Rodriguez Gabriel : Antonio Machado (1875-1939) : vida y obra / con un estudio por Gabriel Pradal-Rodriguez; bibliografia, antologia; obra inedita.