(3TGYQ CfOdS h LGFRI YGdejI (B: (3LhGf QGehf NjefjR UGMH LGFRI fhHd (B1956 - (3OQGSI ddTGYQ hGdLGFRIs - (3GdYbGO(B. (3YHGS eMehOs ((3OGQ GdcJGH GddHfGfjs (3HjQhJs, 1971)
Keywords: (3BOGHs; (3GdTYQGA GdGSHGf (B- (3JQGLe s