(3eDQNh GdTQaGA (B/ s - (3HQhafSGd, djajs; (3GdNdGhj, YHO GdbGOQs ((3GdQHGW (B:s (3OGQ GdeZQH ddJCdja h GdJQLeI h GdfTQ,s, 1977)
Keywords: (3JGQjN GdeZQHs; (3GdJGQjN GdSjGSjs