(3GdeMGSH GdVQjHj (B: s (3OQGSI fXQjI JWHjbjI ebGQfI eY GdJTQjY GdVQjHj GddjHj (B/ s - (3YHO GdQMje, fhM eMeOs ((3djHjG (B:s (3GdLGeYI GddjHjI,s, 1971)
Keywords: (3GdeMGSHIs; (3eMGSHI GdVQGFHs