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Dyfyniad Arddull ChicagoColston Research Society, T. Wallace, and J. T. Martin. Insecticides and Colonial Agricultural Development. London: Butterworths, 1954.
Dyfyniad MLAColston Research Society, et al. Insecticides and Colonial Agricultural Development. Butterworths, 1954.
Rhybudd: Mae'n bosib nad yw'r dyfyniadau hyn bob amser yn 100% cywir.