(3JMbjb eG ddgfO ef ebhdI ebHhdI ai GdYbd Gh eQPhdI (B/ s - (3GdHjQhfi (B, (3GHhGdQjMGf eMeO Hfs; (3SNGh, GOhGQO (B((3JMbjb(B)s ([S.N] : (3eWHYI OGFQI GdeYGQa GdYKeGfjI , s, 1958)
Keywords: (3GdQMdGJs; (3GdQMGdI GdYQHs; (3GdYdhe YfO GdYQHs; (3GdgfOs; (3GdMVGQI GdGSdGejIs