(3EHf SjOI GdeQSj (B/ s - (3QhOQjMK, OGQjhcGHG fjdGSs; (3GdhQGcdj, MSfs ((3JhfS (B:s (3GdOGQ GdJhfSjI ddfTQ,s, 1980)
Keywords: (3GddZhjhfs; (3GdJQGLes