(3GdLZQGajG hGdeLJeY(B: (3HMhK GdfOhI GdGhdi eGQS (B1990 (3HefGSI eQhQ KdGKjf YGeG Ydi GfTGA TYI GdNQGFW hGdeSGMI (B/ s - (3LGeYI GdGScfOQjI(B- (3cdjI GdGOGHs ([S.N] : (3OGQ GdeYQaI GdLGeYjI , s, 1990)
Keywords: (3eSGMI gfOSjIs; (3GdScGfs; (3GdLZQGajG GdQjGVjIs; (3GdNQGFWs; (3eSGMIs