(3abg GdSfI (B/ s - (3SGHb, GdSjO, s 1915- 2000(3, s ((3HjQhJ (B: s (3OGQ GdcJGH GdYQHj, s, 1971)
(3GdeMJhjGJ (B: (3GdeLdO GdChd (B: (3GdCLRGA GdChd hGdKGfj hGdKGdK hGdQGHY hGdNGeS (B// (3GdeLdO GdKGdK (B: (3GdCLRGA GdKGfj YTQ hGdKGdK YTQ hGdQGHY YTQ (B: (3GdeYGedGJ (B((3GdWHYI GdChdi, (B1971) // (3GdeLdO GdKGfj (B: (3GdCLRGA GdSGOS hGdSGHY hGdKGef hGdJGSY hGdYGTQ hGdMGOj YTQ (B((3GdWHYI GdKGdKI, (B1977).s
Keywords: (3Gdabg GdESdGejs; (3GdSfI GdfHhjIs