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GEOLOGY ON POST STAMPS |
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GEOLOGY ON POST STAMPS |
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Niemiecka Republika Demokratyczna / German Democratic Republic
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Roślina szpilkowa Lebachia speciosa Conifer Lebachia
speciosaColl. G. Barczyk |
Karbońska paproć Sphenopteris hollandica Carboniferous
fern Sphenopteris hollandica Coll. A. Kozlowski |
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Permska paproć Botryopteris Permian fern Botryopteris Coll. A. Kozlowski |
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