(3CUhd GdeMGceGJ GdLRGFjI(B.s (3GdLRA GdChd,s (3GdOYGhj GdJj jfXQgG GdbVGA GdLRGFj (B/s - (3GdLhNOGQ, MSfs ((3MdH, ShQjG (B:s (3LGeYI MdH,s, 1990)
(3jTJed Ydi EQLGYGJ HHdjhLQGajI(B.s
Keywords: (3bGfhf GdELQGAGJ GdLfGFjIs -- (3ShQjGs; (3GdeMGceGJ GdLfGFjIs -- (3ShQjGs