(3Odjd GdQSe h GdJUhjQ (B/ s - (3CfOQhR, CdjRGHjKs; (3NVhQ, COjHs ((3OeTb (B:s (3OGQ GdLjd ddWHGYI h GdfTQ h GdJhRjY,s, 1990)
Keywords: (3GdQSes; (3GdJUhjQs