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Here are details about a : Space commemorative cover or Space Cover.
Kosmodrom / Plats : USA
Stämpeldatum: 26 Mar. 1958 Händelsetyp : Uppskjutning Startplatta / Plats : USA KSC (FL) Bemannad / Robotisk Mission : Robotisk Uppdragsmål/Typ : Experimentell / Vetenskap
SCIENCE
ou?/where?: au sol - ground
autographe?: non - none
Beskrivning : Explorer III US satellite program achieved orbit on March 26, 1958 yielded important data on outer space radiation belts and micrometeor impacts.