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n2.Tsu Chung-chih

  • Colnect-781-775-Tsu-Chung-chih-AD-429-500-mathematician.jpg
Short desc: n2.Tsu Chung-chih




This design is used by 1 stamp:
China, PRC 8/25/1955 8f blgrn dt=scientists (1955) perf=14






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