(3GdGJLGg GdhLOGfi ai GdTYQ GdYQHi GdeYGUQ (B/ s - (3GdbW (B: (3YHO GdbGOQ s ((3HjQhJ (B:s (3OGQ GdfgVI GdYQHjI (B:s, 1981)
(3jTJed Ydi GQLGYGJ HHdjhLQGajI h cTGas
Keywords: (3GdTYQ GdYQHis -- (3JGQjN h fbOs