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Dyfyniad Arddull ChicagoLewis, Shirley, Janet Macdonald, and Jean Riddle Weihs. Nonbook Materials: The Organization of Integrated Collections. [Ottawa]: Canadian Library Association, 1973.
Dyfyniad MLALewis, Shirley, et al. Nonbook Materials: The Organization of Integrated Collections. Canadian Library Association, 1973.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.