00325pam a2200145a 44500008004100000020000900041041001200050082000900062100002500071245002100096250000600117260003900123300000800162650000900170230515b1990    xxu||||| |||| 00| 0 eng d  aNULL  aENGLISH  aN.D.  aVan Valkenburg M. E.  aNetwork Analysis  a0  aNULLbPrentice Hall Of Indiac1990  a571  aNULL