《中国现代科学家（六）》

2014-25, Scientists of Modern China (6th Set)《中国现代科学家（六）》 Stamp Title: Scientists of Modern China (6th Set) Serial number: 2014-25 Values in set: 6 (6-1), Wang Ganchang, 120 fen, 30 * 50 mm (6-2), Zhao Jiuzhang, 120 fen, 30 * 50 mm (6-3), Guo Yonghuai, 120 fen, 30 * 50 mm (6-4), Deng Jiaxian, 120 [...]