Não informado. (1930). Annals of Mathematical Statistics. Institute of Mathematical Statistics.
Chicago-referens (17:e uppl.)Não informado. Annals of Mathematical Statistics. Ann Arbor, Mich: Institute of Mathematical Statistics, 1930.
MLA-referens (8:e uppl.)Não informado. Annals of Mathematical Statistics. Institute of Mathematical Statistics, 1930.
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