(3efGXQ GdWQH ai GdJUhjQ GdGjQGfi ai GdYUQjf GdJjehQi hGdUahi (B/ s - (3UdGM GMeO GdHgfSis ((3GdbGgQI (B: s (3ecJHI eOHhdi , s, 1990)
Keywords: (3GdGTcGd GdehSjbjIs; (3GdJUhjQ GdGSdGeis; (3GdZfGA (B- (3GjQGf (B- (3JGQjNs; (3GdehSjbi (B- (3GjQGf (B- (3JGQjNs