Geothermal Exploration (Trinidad and Tobago 1979)

03 July (Trinidad and Tobago ) within release 4th Latin American Geological Congress goes into circulation Stamp Geothermal Exploration face value 10 Trinidad and Tobago cent

Stamp Geothermal Exploration in catalogues
Michel:	Mi:TT 391

Stamp is square format.

Also in the issue 4th Latin American Geological Congress:

• Stamp - Geothermal Exploration face value 10;
• Stamp - Hydrogeology face value 35;
• Stamp - Petroleum Exploration face value 45;
• Stamp - Environmental Preservation face value 70;
• Souvenir Sheet - 4th Latin American Geological Congress face value 160;