(Engel) (14.2.1891, , - 10.5.1966, ), () . 1910 , , . . " " ( . 20- .) . 40- . " ", 1956-66 . : " ", " " ( 1949), " ". (1957), " " (1960), " " (1962) . (" ", 1948, .). (1949, 1957).


: