Stamps of Colombia, 29 Oct 1968
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postage
1968, Oct 29 100th Anniversary of National University issue unwmk p. 13.5x14
| - | 80c | multi | Arms of National University |
airmail
1968, Oct 29 1st Congress for Electronic Data Processing / 100th Anniversary of National University, Bogota issue
| - | 20c | multi |
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