Hungary 1659-1667, 1668

Hungary 1659-1667, 1668, MNH, $5.35. Michel 2101-2109, 2110 Bl.46, Euros 9.50. International Quiet Sun Year IQSY-1964-1965. Arctic Exploration, Helicopter, Ionosphere, Atmosphere research, Radar, Rocket and Earth, reflecting layer diagrams, Telescope, Map of Milky Way, Radio astronomy, Earth magnetism, Compass rose, Weather balloon, lighting, Meteorology, Aurora borealis, penguins, Arctic research, Satellite, Planets, Space research, World map. Sun with flares and corona, Snow crystals, Rain. 1965.