(3GdJGQjN GdGSdGej hacQ GdbQf GdYTQjfs - (3YeQ(B. (3aGQhbs ((3eDSSI GdeWHhYGJ GdYQHjIs (3HjQhJs, 1980)
Keywords: (3GdGSdGe (B- (3JGQjNs; (3GdJGQjN GdGSdGejs