00337pam a2200145a 44500008004100000020000900041041001200050082000900062100002200071245004200093250000600135260003100141300001000172650000900182230515b1999    xxu||||| |||| 00| 0 eng d  aNULL  aENGLISH  aN.D.  a"Leon A., Leon M"  aFundamental of Information Technology  a0  aNULLbLeon Techworldc1999  a36.12  aNULL