Letter (on SQL support of time).

@article{DBLP:journals/sigmod/Snodgrass89,
  author    = {Richard T. Snodgrass},
  title     = {Letter (on SQL support of time)},
  journal   = {SIGMOD Record},
  volume    = {18},
  number    = {3},
  year      = {1989},
  pages     = {102-103},
  ee        = {db/journals/sigmod/Snodgrass89.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

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