Stamps of Bulgaria, 7 Apr 1976
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postage
1976, Apr 7 5-year plan 1976 issue unwmk p. 13x13.25 (5 stamps)
| X | 5s | brn & grn & grnsh | AES Complex | |||
| X | 8s | brncar | Thermal energy center Bobovdol | |||
| X | 10s | blkgrn | Chemical Combine Sviloza | |||
| - | 13s | dkvio | Chemical Plant Devnya | |||
| - | 20s | blgrn | Hydropower plant Sestrimo |
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