Cooper, D. G. Das Periodensystem der Elemente.
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Dyfyniad Arddull Chicago
Cooper, Desmond Grosvenor. Das Periodensystem Der Elemente.
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Dyfyniad MLA
Cooper, Desmond Grosvenor. Das Periodensystem Der Elemente.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.