(3SLd GdYQH (B/ s - (3dLfI ef GSGJPI GdLGeYGJs; (3GHQGgje YHOgs ([S.N] : (3GdTQcI GdYQHjI ddYdGbGJ GdGbJUGOjI hGdKbGaI , s, 1960)
Keywords: (3GdGbJUGOs; (3GdJLGQIs; (3GdhWf GdYQHis; (3GdYdGbGJ GdNGQLjIs