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, . - : , , .

(Edwards & Whiting, 1980) , 5 12 , , . , , , , , , .

, (Barry, Bacon & Child) , , , , (82 % ), (35 % ) (61% ). , , (87 % ) (85 % ), . 108 , (Welch, Page & Martin, 1981) , , , .

- , , , , , , (Ember, 1981; Freedman & DeBoer, 1979; Strube, 1981). , , . . (. . Whiting & Edwards, 1988), , , , , . , , , (Omark, Omark & Edehnan, 1975). , , , - (Blurton-Jones & Koner, 1973) , - . (R. L. Munroe, Hulefeld, Rodgers, Tomeo & Yamazaki, 2000) , , . , , .

, , , , , - . (Minturn & Lambert, 1964). , . , (Ramirez, 1993), (Burbank, 1987).

, , (Boehnke, Silbereisen, Eisenberg, Reykowsky & Palnionary, 1989) , , . 12 , , , .





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