Bibliografía

1987. PHILATELIC TERMS ILLUSTRATED. James Mackay. Stanley Gibbons. London, 1987. (muy interesante libro en inglés ideal para interpretar el vocabulario especializado, expositores internacionales, seguimineto de subastas extranjeras, etc)

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1987. PHILATELIC TERMS ILLUSTRATED. James Mackay. Stanley Gibbons. London, 1987. (very interesting book in English, ideal for interpreting specialized vocabulary, international exhibitors, following foreign auctions, etc.)