(3GdefGgL GdJQHhjI(B: (3eQJcRGJgG(B, (3JWhjQgG(B, (3hJWHjbGJgG (B/ s - (3JheG LhQL NhQis ([S.N] : (3GdeDSSI GdLGeYjI ddOQGSGJ hGdfTQ hGdJhRjY , s, 1988)
Keywords: (3GdJYdjes; (3GdefGgLs