, . . , 1931. , , , . , , - . . , . . , . . , . . , . . .

(" ", " " , " " " " , " " , "" , "" " " , "" , " " ), ("" , "" ) (" " , " " ) . . . . , 1932 ( 1955 " ", ). - . . ( " ", " " " "), . . ( " " " "), . . ( " ") .

(1970): . . , . . . . , . . , . . , . . , . . , . . . ( 1970) - . . , ( 1950) - . . .

: