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Ķīmisko elementu simboli, to izruna
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Ķīmisko elementu simboli, to izruna
Elementary schoolSummaries, Notes1 -
Ķīmisko vielu ietekme uz dabu
Elementary schoolSummaries, Notes2 -
Neorganisko vielu praktiskā izmantošana
Elementary schoolSummaries, Notes1
Ķīmisko elementu simboli, to izruna
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