Nandlal L. Sarda Extensions to SQL for Historical Databases. 220-230 TKDE2/P0220.pdf 1990 2 IEEE Trans. Knowl. Data Eng. 2 db/journals/tkde/tkde2.html#Sarda90 db/journals/tkde/Sarda90.html journals/tods/Ariav86 journals/sigmod/BolourADW82 journals/ibmrd/ChamberlinAEGLMRW76 journals/tods/CliffordW83 conf/sigmod/CliffordT85 ... journals/ins/NavatheA89 ... journals/cj/Sarda90 ... ... ... journals/sigmod/Snodgrass86 journals/computer/SnodgrassA86 journals/tods/Snodgrass87 journals/tkde/SnodgrassGM93 ... books/cs/Ullman82 journals/tods/MarchS77 journals/sigmod/Date88