(3fSGA Ggd GdLfI (B/ s - (3YHOGdYRjR GdTfGhis ([S.N] : (3ecJHI GdJQGK GdGSdGei , s, 1990)
Keywords: (3GdOjf GdGSdGeis; (3GdJQGLes; (3GdfSGAs