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Dyfyniad Arddull ChicagoHunter, Eric J. Classification Made Simple: An Introduction to Knowledge Organisation and Information Retrieval. 3rd ed. Farnham: Ashgate, 2009.
Dyfyniad MLAHunter, Eric J. Classification Made Simple: An Introduction to Knowledge Organisation and Information Retrieval. 3rd ed. Ashgate, 2009.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.