(3GdZHf hGdGSJZdGd Hjf GdTQjYI GdGSdGejI hGdbhGfjf GdhVYjI (B: s (3OQGSI ebGQfI (B/ s - (3GdRHjOj, RgjQ, s ((3HZOGO (B[(3GdYQGb(B] : s (3eWHYI OGQ GdSdGe (B973.s, 1973)
(3jJVef GQLGYGJ HHdjhLQGajI (B: (3UaMI (B258-265.s
Keywords: (3GdYbhO (B((3bGfhf eOfj(B)s; (3GdYbhO (B((3abg GSdGej(B)s