:

  •  
                                                          

    ( . 1922)

    ( . 1922)

    . ( 1969). 20 . : " 1917-1956 ." (1959), " " (1968), "" (1972), " . 60- ." (1977) .

    ( 95-175)
    (1888-1968)
    () (Weisenborn) (1902-69)

    ( . hals - ergon -
    :