(3GdGjhHjhf aj GdTeGd GdTGe hGdLRjQI (B564(3g(B-648(3e(B/1168(3e(B-1250(3e(B:s - (3GdJcQjJj ,eMehO jGSjf GMeO s ((3HZOGO (B:s (3OGQ GdQTjO,s, 1981)
Keywords: (3GdGjhHjhf s