(3ebGdGJ aj GdTYQ hfbOg(B\(3JCdjas - (3YWhGf,MSjf,s ((3HjQhJ,dHfGf(B:s (3OGQ GdLjd ddfTQ,s, 1987)
Keywords: (3GdTYQ GdYQHjs -- (3JGQjN hfbOs