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Scientists (1987)
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scientists (1990)
Scientists (1988) design type
Short desc: Scientists (1988)
Used by 4 stamps:
(See all uses as list)
China, PRC 4/28/1988 8f d=Li Siguang perf=11x11.5
China, PRC 4/28/1988 10f d=Zhu Kezhen perf=11x11.5
China, PRC 4/28/1988 20f d=Wu Youxun perf=11x11.5
China, PRC 4/28/1988 30f d=Hua Luogeng perf=11x11.5