(3GdceHjhJQ haf GdRNQaI (B: (3SdSI GdPcGA GdGUWfGYi hGdQSe GdceHjhJQi GdJWHjbi (B/ s - (3GfjS MHdis ((3HjQhJ (B: s (3OGQ GdQGJH GdLGeYjI , s, 1989)
Keywords: (3Gdafhf GdLejdIs; (3GdRNQaIs; (3Gdaf GdRNQais; (3GdJUeje GdRNQais