00277nam a22001097a 4500003000400000008004100004082001800045100001600063245003500079260004500114300000800159OSt230612b        |||||||| |||| 00| 0 eng d  a519.5bEXT265  aHagen, E.E.  aOn The Theory of Social Change  aVakils FefferbIAB Books, Calcuttac1962  a158