Katsumi Tanaka Eitetsu Ohmoto HistoryChart: A Visual Language for Historical Databases. 18-24 1989 DASFAA db/conf/dasfaa/dasfaa89.html#TanakaO89 conf/dasfaa/89 DASFAA89/P018.pdf journals/sigmod/Snodgrass86 conf/pods/Snodgrass84 conf/pods/GadiaV85 conf/sigmod/CliffordT85 ... journals/tods/GinsburgT86 conf/vldb/GinsburgT84