Exponet Code 0031:
PETROLEUM - THE BLACK GOLD
http://www.japhila.cz/hof/0031/index0031a.htm
Class for Thematic Philately
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Exponet Code 0402:
ENERGIA NUCLEAR
http://www.japhila.cz/hof/0402/index0402a.htm
Class for Thematic Philately
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Links:
http://www.professorsoares.adv.br/
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