(3LGeY GdYdhe ai GUWdGMGJ Gdafhf (B: s (3GdedbH HOSJhQ GdYdeGA (B/s - (3YHOGdfHi Hf YHOGdQShd GdGMeO fcQis ((3HjQhJ (B:s (3eDSSI GdGYdi ddeWHhYGJ ,s, 1975)
Keywords: (3GddZI GdYQHjI s; (3OSJhQ GdYdeGA s; (3GdeYGLes; (3GdYdhe YfO GdYQHs; (3GdMVGQI GdGSdGejIs; (3GdeUWdMGJs