(3GdGSdGe ai GdUjf (B((3YGde GdeYQaI (B43) / s - (3agei ghjOis ([S.N] : (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 1981)
Keywords: (3GdUjfs; (3GdGSdGe ai GdUjfs