National Science and Technology Day 1987
Ditunjukkan sekarang: Costa Rica - Setem-setem bayaran pos - 1987 - National Science and Technology Day - 1 Setem-setem.
Ditunjukkan sekarang: Costa Rica - Setem-setem bayaran pos - 1987 - National Science and Technology Day - 1 Setem-setem.
![[National Science and Technology Day, jenis AHZ]](https://www.stampworld.com/media/catalogue/Costa-Rica/Postage-stamps/AHZ-s.jpg)
