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ϳ P-㳿 , . ˳ (1920) Public Opinion (1922). , ' . , . , . л ( ). 㳿 . 1923 - . , , (1923), . 20-30- XX . , - . ³ , . . - . , 30- : 1936 The National Association of Accredited Publicity Directors, 1938 - The American Association of Industrial Editors, 1939 - The American Council on Public Relations. . ' , ( 1912 - '), ' , .

. - . , , , ' . , . , 30- , .

볿 20- , , . , , , , . 1932 --ѳ , , 62 .

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