(1949). The Advancement of science. Brit.Assoc.for the advancement of science.
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Dyfyniad Arddull Chicago
The Advancement of Science. London: Brit.Assoc.for the advancement of science, 1949.
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Dyfyniad MLA
The Advancement of Science. Brit.Assoc.for the advancement of science, 1949.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.