, , (Whipple) (1866-1924), . , . (1911). . - (1889). 1911 -. . . . . 'Vital statistics; an introduction to the science of demography' (2 ed., 1923) . . . . 1917 . .

. .: , . 1929 (. . . ).

. . .


:

  1. /.. .. .: - 1985










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