Mario Diena

Dr. Mario Diena (1891-yil 6-iyul – 1971-yil 4-noyabrBackground notes on The Roll of Distinguished Philatelists September 2011, Roll of Distinguished Philatelists Trust, London, 2011. Archived here.) — italyan filatelisti. U 1956-yilda Taniqli filatelistlar ro‘yxatiga kiritilgan.

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