| USA 1967 (7 Jun) Space Cover NCAR BALLOON BASE Palestine Texas
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| USA 1967 (7 Jun) Space Cover "BALLOON LAUNCHED/FROM/IMAGE BALLOON/NCAR BALLOON BASE/ PALESTINE TEXAS" and typed manu"COSMIC RAY STUDY FOR DR./L. PETERSON OF UNIV. OF/ CALIF. SAN DIEGO" unaddressed and affixed with 5c USA Flag stamp cancelled "PALESTINE, TX/JUN 7/PM/1967/75801"
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Item #: INV-128439
Condition Co
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