Green, C. V. (1928). Birth and death rates of the feeble minded.
Lua i Stíl Chicago (17ú heag.)Green, Charles V. Birth and Death Rates of the Feeble Minded. Cold Spring Harbor, L. I., N. Y, 1928.
Lua MLA (8ú heag.)Green, Charles V. Birth and Death Rates of the Feeble Minded. 1928.
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