(3eTQhY eda GdefXheI GdJQHhjI (B/s - (3GdeQcRjI , GddLfI s ([(3Ohf ecGf(B] :s (3OjhGf GdeWHhYGJ GdLGeYjI ,s, 1988)
Keywords: (3GdJQHhjI s; (3GdefXheI s; (3eTQhY s; (3eda s