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O comércio ultramarino espanhol no Prata
Garcia, Emanuel Soares da Veiga, (1982)
Estudios aduaneros : concepto y naturaleza jurídica de las instituciones aduaneras
Sánchez González, Ildefonso, (1974)
Trade in place of migration : an employment-oriented study with special reference to the Federal Republic of Germany, Spain and Turkey
Hiemenz, Ulrich, (1979)