(3eMGVQGJ ai GdfUQGfjI (B: s (3JHMK ai GdGOhGQ GdJi eQJ YdjgG YbGFO GdfUGQi hai cJHge hai eLGeYge GdebOSI haQbge (B/ s - (3eMeO GHhRgQIs ((3GdbGgQI(B;s (3OGQ GdacQ GdYQHi(B:s, 1972)
Keywords: (3GdOjGfI GdeSjMjIs