Astronomy
Country: | Poland |
Quality: | Postal stationery |
Year of issue: | 1977 |
Astronomy
Country: | Brazil |
Quality: | MNH |
Year of issue: | 1977 |
Michel number: | 1621 |
Monuments
Country: | Peru |
Quality: | MNH |
Year of issue: | 1977 |
Michel number: | 145-146 |
Astronomy
Country: | Germany, Federal... |
Quality: | MNH |
Year of issue: | 1977 |
Michel number: | 928 |
Physics
Country: | Germany, Democratic... |
Quality: | MNH |
Year of issue: | 1977 |
Michel number: | 2215 |
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