(3fXe GdOQ hGdYbjGf ai eMGSf GdcdGe (B/ s - (3fhQi ShOGfs; (3GdJfSi (B, (3GHhYHOGddg eMeO Hfs ([S.N] : (3aQGfS TJGjR , s, 1980)
Keywords: (3GdTYQ GdYQHis; (3GdGOH GdYQHis; (3GdHdGZI GdYQHjIs