(3eONd Edi fbO GdMbhb (B/s - (3OGQSj, a(B.s; (3HhQLhd, e(B.s; (3OhLGQOGf, a(B.s; (3LdjRGd, L M(B.s; (3ejGj, CLehhe(B.s; (3MOGO, Sdjes ((3HjQhJ (B:s (3GdeDSSI GdLGeYjI ddOQGSGJ hGdfTQ hGdJhRjY,s, 1981)
Keywords: (3GdMbhb GdeOfjIs -- (3bhGfjf hJTQjYGJs