000 00249nam a22000977a 4500
003 SGT
245 _aACM TRANSACTIONS ON DATA BASE SYSTEMS
260 _aNEW YORK
_bASSOCIATION FOR COMPUTING MACHINERY (FEB - MAY)
_c2012
300 _aV.P
942 _2ddc
_cBV
999 _c20183
_d20183