(3GdCJdfJjO (B: s (3eSQMjI TYQjI aj CQHYI aUhd (B/ s ((3HjQhJ (B- (3dHfGf (B: s (3eDSSI GdQSGdI (B- 1980 (3, s, 1980)
Keywords: (3GdeSQM GdTYQj; GdCOH GdYQHj GdMOjKs