Sigel, A., Sigel, H., & Sigel, R. K. O. (2017). Lead: Its effects on environment and health. De Gruyter.
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Dyfyniad Arddull Chicago
Sigel, Astrid, Helmut Sigel, and Roland K. O. Sigel. Lead: Its Effects on Environment and Health. Berlin, [Germany] ; Boston, [Massachusetts]: De Gruyter, 2017.
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Dyfyniad MLA
Sigel, Astrid, et al. Lead: Its Effects on Environment and Health. De Gruyter, 2017.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.