Mathematical Symbols - 1st Electronic Calculus Congress - National University

Símbolos Matemáticos - 1°Congreso de Cálculo Electrónico - Universidad Nacional
OwnerHerman Cudris Castañeda
ObservationsCodes: Michel:CO 1140 - Stamp Number:CO C510 - Yvert et tellier:CO PA491 - Stanley Gibbons:CO 1268 - Leo Temprano:CO 1174
CountryColombia
Face value0,20 Ctvos
Year1968
StateUsed
StatusExhibition - Non-transferable
CategoryEducation
FormatVertical
Colormulticolor.
PrinterThomas de la Rue & Cia Ltda.
Other informationPerforated stamp Air mail
visualizations177