the method of stratified sampling and the method of purposive selection (in Journal of the Royal Statistical Society, 1934)
tˈe mˈetod ˈof stratˈifjed sˈampliŋɡ ˈand tˈe mˈetod ˈof pʊrpozˈive selˈektjon in dʒoˈurnal ˈof tˈe rˈojal statistˈikal sotʃˈetɪ, mˈille novetʃˈɛnto trˈeːntakwˈatːro