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Dyfyniad Arddull ChicagoWolff, Kirsten. Natural Selection in Plantago Species: A Genetical Analysis of Ecologically Relevant Morphological Variability. Netherlands: Rijksuniversiteit te Groningen, 1988.
Dyfyniad MLAWolff, Kirsten. Natural Selection in Plantago Species: A Genetical Analysis of Ecologically Relevant Morphological Variability. Rijksuniversiteit te Groningen, 1988.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.