"" , , 20- .. . 1920. " " (1920), ., .. " " (1920-1940) - , . - " " (1926), .. "" (1930-1934). " "" "",- .. " " (1927-1928) .
. 20- .. , , ., ., . .. "" (1923-1925), ., ., . . "" (1922-1923). " " - (56; 247-254). , , " " (1922-1932), " " (1924-1926). "" " " - (1921-1922), (1922-1924), (1927). (52). " " , .
-. - "" "", "", " " ., . "" (1925-1943).
1928. . 25 1925 . " " - ( ). 17 11 , . ., ., ., ., ., ., ., . . ( ). : 39, - 10, - 16, - 8, - 5. .
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: ( 100- .), , . 14 , - ., ., ., . . " , , , ... " (21; 23). . , . " " , , " ", .
, 20- .. 900-10- .., . , , , , , , , "" . , , . , , "" , (33; 239-243). 30- .. . , " " ( ). , , - .. 30- . .
"" . 1928. .. . ., ., " " , "- ".