Energy in the 21st Century - Geothermal Technology 1999
Đang hiển thị: En-san-va-đo - Tem bưu chính - 1999 - Energy in the 21st Century - Geothermal Technology - 2 tem.
Đang hiển thị: En-san-va-đo - Tem bưu chính - 1999 - Energy in the 21st Century - Geothermal Technology - 2 tem.
![[Energy in the 21st Century - Geothermal Technology, loại AWA]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/AWA-s.jpg)
![[Energy in the 21st Century - Geothermal Technology, loại AWB]](https://www.stampworld.com/media/catalogue/El-Salvador/Postage-stamps/AWB-s.jpg)
