(3bdH GhQhHG (B: s (3cdeGJ YQHjI Yf JTjchSdhaGcjG (B/ s - (3ceGd GdOjf QaYJs; (3jhSa GdSHGYis; (3GMeO WhZGfs ((3GdbGgQI (B: s (3OGQ GdgfG ddWHGYg , s, 1968)
Keywords: (3JTjchSdhaGcjGs; (3JTjchSdhaGcjG (B- (3GdGMhGd GdSjGSjIs