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Dyfyniad Arddull ChicagoHeslop-Harrison, J. New Concepts in Flowering Plant Taxonomy. Cambridge, Mass: Harvard University Press, 1953.
Dyfyniad MLAHeslop-Harrison, J. New Concepts in Flowering Plant Taxonomy. Harvard University Press, 1953.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.