(3GdGSJTQGb ai Gdaf GdQheGfSi GdaQfSi (B((3YGde GdeYQaI (B157 ) / s - (3RjfGJ HjWGQs ([S.N] : (3GdeLdS GdhWfi ddKbGaI hGdafhf hGdGOGH , s, 1992)
Keywords: (3GdGSJTQGb hGdeSJTQbhfs; (3GdWQb GdafjIs; (3GdJUhjQs; (3GdJUhjQ Gdafis; (3GdQheGfJjcjI ai Gdafs