(3eSGdI GdbVGA hGdbOQ (B: s (3fTGJgG dOi GdadGSaI hGdeJcdejf HMKgG Ydi ebJVi efgL GdSda (B/ s - (3bfHS, YHO GdMdje eMeO, s; (3GdYc, NGdO YHO GdQMef, s ((3OeTb (B[(3ShQjG(B] : s (3OGQ GdcJGH GdYQHj, (B399 (3g`(B. = 1979.s, 1979)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B186-188.s
Keywords: (3GdbVGA hGdbOQ(B.s