Ng, S. T. Observations on mortality in caged laying chickens. 1987.
シカゴスタイル引用形Ng, Siew Thiam. Observations On Mortality in Caged Laying Chickens. 1987.
MLA引用形式Ng, Siew Thiam. Observations On Mortality in Caged Laying Chickens. 1987.
警告: この引用は必ずしも正確ではありません.