conf/vldb/96 Alon Y. Levy Anand Rajaraman Joann J. Ordille Querying Heterogeneous Information Sources Using Source Descriptions 251-262 1996 VLDB db/conf/vldb/vldb96.html#LevyRO96 db/conf/vldb/LevyRO96.html VLDB96/P251.PDF journals/ijcis/ArensCHK93 conf/sigmod/AdaliCPS96 journals/computer/ColletHS91 conf/icde/ChaudhuriKPS95 journals/cacm/EtzioniW94 ... conf/coopis/FlorescuRV95 conf/vldb/KonopnickiS95 conf/pods/LevyMSS95 conf/aaai/LevyRO96 conf/pods/LevyRU96 journals/jiis/LevySK95 conf/pods/Morris88 conf/icdcs/OrdilleM93 conf/dood/PapakonstantinouGGU95 conf/pods/RajaramanSU95 conf/pods/RajaramanU96 conf/vldb/SrivastavaDJL96 conf/vldb/YangL87