《中国现代科学家（七）》

2016-11, Scientists of Modern China (7th Set)《中国现代科学家（七）》 Stamp Title: Scientists of Modern China (7th Set) Serial number: 2016-10 Values in set: 4 (4-1), Ding Wenjiang, 120 fen, 30 * 50 mm (4-2), Jin Shanbao, 120 fen, 30 * 50 mm (4-3), Ye Qisun, 120 fen, 30 * 50 mm (4-4), Ye Duzheng, 120 [...]