(3GdJfejI GdPGJjI hGdeSFhdjI aj GdESdGe (B/s - (3GdYfGfj, MSf UGdMs ([(3O(B.(3e(B.] :s (3GdGJMGO GdOhdj ddHfhc GdESdGejI ,s, 1900)
Keywords: (3GdESdGe hGdJfejI GdGbJUGOjI hGdPGJjI s; (3KbGaI ESdGejI s