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 Disasters induced by geophysical effects
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 1957/58 : IGY-Campaign
IGY: International Geophysical Year
 Congresses of Geophysical interest
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 Geophysically relevant cruises of ships
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  found 1 countries with filter 1111,x,x: Geoelectrics

General Geophysics on Stamps - Allgemeine Geophysik auf Briefmarken - Géophysique sur les timbres - Selected topic(s): Geoelectrics

Angola 1971

? Geoelectrics in Soil exploration


Categories1: Geoelectrics


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Philatelic Objcts with topic: Geoelectrics on 25.06.2021