Stamps of Argentina, 25 Apr 1980
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postage
1969, Dec 13 National Development Projects issue unwmk p. 13.5
| - | 300p | multi | Estación Terrena Balcarce | |||
| - | 300p | multi | Railway- & roadbridge near Zarate | |||
| - | 300p | multi | Hydropower plant Salto Grande |
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