Hedrich, A. W. (1940). International Vital Statistics, Vital Statistics—Special Reports, Vol. 9, No. 36.
シカゴスタイル引用形Hedrich, A. W. International Vital Statistics, Vital Statistics—Special Reports, Vol. 9, No. 36. 1940.
MLA引用形式Hedrich, A. W. International Vital Statistics, Vital Statistics—Special Reports, Vol. 9, No. 36. 1940.
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