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Dihlordifeniltrihloretāns DDT
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Dihlordifeniltrihloretāns DDT
Secondary schoolSummaries, Notes2 -
Pesticīdi
Secondary schoolSummaries, Notes4 -
Svina oksīda un svina izmantošana
Secondary schoolSummaries, Notes2
Dihlordifeniltrihloretāns DDT
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