Codd75b'

BibTeX

@article{DBLP:journals/sigmod/Codd75b,
  author    = {E. F. Codd},
  title     = {Understanding Relations (Installment \#7)},
  journal   = {FDT - Bulletin of ACM SIGMOD},
  volume    = {7},
  number    = {3},
  year      = {1975},
  pages     = {23-28},
  ee        = {db/journals/sigmod/Codd75b.html},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}