Leitch, I., & Billewicz, W. Z. (1963). A scheme for classification of information on nutrition coded for machine retrieval. Commonwealth Agricultural Bureaux.
Dyfyniad Arddull ChicagoLeitch, Isabella, and Władysław Zbigniew Billewicz. A Scheme for Classification of Information on Nutrition Coded for Machine Retrieval. Farnham Royal, Slough, Bucks,: Commonwealth Agricultural Bureaux, 1963.
Dyfyniad MLALeitch, Isabella, and Władysław Zbigniew Billewicz. A Scheme for Classification of Information on Nutrition Coded for Machine Retrieval. Commonwealth Agricultural Bureaux, 1963.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.