(3GdYdGbGJ GdeUQjI GdShOGfjI (B: s (3Hjf GdeGVi hGdMGVQ hGdeSJbHd (B/ s - (3GSGeI GdZRGdi MQHs; (3GSGeI ZjKs; (3GdWjH MGL YWjIs ((3GdbGgQI (B: s (3eQcR GdHMhK hGdOQGSGJ GdSjGSjI , s, 1990)
Keywords: (3GdJYGhf GdOhdis; (3GdYdGbGJ GdNGQLjIs; (3GdShOGf (B- (3GdYdGbGJ GdNGQLjIs