(3eTGcd JdhK GdHjFI GdRQGYjI hJWhjQ WQb GdecGaMI ajgG (B/s - (3GdejGS, YUGes ((3HjQhJ (B:s (3eYgO GdEfeGA GdYQHj,s, 1981)
(3HHdjhLQGajI (B: (3U(B. 115-119.s
Keywords: (3GdJQHIs -- (3JdhKs; (3GdJdhK GdRQGYjs