Não informado. (1930). Annals of Mathematical Statistics. Institute of Mathematical Statistics.
शिकागो शैली (17वां संस्करण) प्रशस्ति पत्रNão informado. Annals of Mathematical Statistics. Ann Arbor, Mich: Institute of Mathematical Statistics, 1930.
एमएलए (8वां संस्करण) प्रशस्ति पत्रNão informado. Annals of Mathematical Statistics. Institute of Mathematical Statistics, 1930.
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