(3eMGVQGJ ai GdJWhQ GdGbJUGOi (B/ s - (3UbQ GMeO UbQs ([S.N] : (3dLfI GdGYdGe hGdOQGSGJ GdeSJbHdjI , s, 1990)
Keywords: (3GdGMhGd GdGbJUGOjIs; (3JGQjN GdYUhQ GdhSWis; (3GhQHGs