(3OYhI Gdi GdehSjbi (B((3YGde GdeYQaI (B46) / s - (3jhSa GdSjSis ([S.N] : (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 1981)
Keywords: (3GdehSjbis; (3GdGTcGd GdehSjbjIs; (3GdehSjbjhf (B- (3JQGLes