, (Davidson) (. 9.11.1914, ), . 2- 1939-45. . " ? 40" (1949) -. " " (1952) . " " (1956, . . 1960), " " (1961), . - . " " (1966).

. . .: , ., 1962; ׸ . : , ., 1964.

.: ., . XX , ., 1967; , , ., 1971.

: