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Source:
Colnect
Issued by:
United States
Function:
postage
Date:
4/29
/
1982
Issue:
Knoxville World's Fair
Denom:
20c
Color:
multicolored
Design:
synthetic fuels
Watermark:
unwmk
Perf:
11
Sort pos:
2
Catalog value:
In collections:
mint
(Stan Shebs)
Prev:
20c d=solar energy
Next:
20c d=breeder reactor
External links:
Colnect 94127-..tes_of_America
