Heling, D. (1963). Zur Petrographie des Stubensandsteins.
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Dyfyniad Arddull Chicago
Heling, Dietrich. Zur Petrographie Des Stubensandsteins. Tübingen, 1963.
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Dyfyniad MLA
Heling, Dietrich. Zur Petrographie Des Stubensandsteins. 1963.
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Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.