Colnect-2274-472-Mathematic-Symbols.jpg
Source: Colnect
Issued by: Colombia
Function: airmail
Date: 10/29/1968
Issue: 1st Congress for Electronic Data Processing / 100th Anniversary of National University, Bogota
Denom: 20c
Color: multicolored
Design:
Watermark: unwmk
Perf: 13.5x14
Catalog value:



External links:
Colnect 272039..versity_1st_Da

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