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Source:
Colnect
Issued by:
Nicaragua
Function:
postage
Date:
5/15
/
1971
Issue:
Physical Laws and Mathematical Formulas
Denom:
1cord
Color:
multicolored
Design:
K. Ziolkowski
Watermark:
Perf:
Catalog value:
Prev:
40c d=L. Boltzmann unwmk
Next:
1cord d=Louis de Broglie unwmk
External links:
Colnect 533762..aw-Mathematics
