Czechoslovakia 836-838

Date of Issue: December 20, 1957

Topic: International Geophysical Year

Scott's #	Michel's #	Topic	Image
836	1055	Radio Telescope and Observatory at Ondrejov, Czechoslovakia	Czech #836
837	1056	Remote Meteorological Station in High Tatra	Czech #837
838	1057	Sputnik 2 over Earth	Czech #838