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Source:
Colnect
Issued by:
United States
Function:
postage
Date:
6/16
/
2011
Denom:
forever
Color:
multicolored
Design type:
American scientists
Design:
Melvin Calvin
Watermark:
unwmk
Perf:
11
Catalog value:
Prev:
5/23/2011 forever issue=Love 2011
Next:
forever d=Asa Gray
Catalog numbers:
WNS US069.11
External links:
Colnect 412300..tes_of_America
WNS US069.11
Record of changes
