BachmanD77'

@inproceedings{DBLP:conf/vldb/BachmanD77,
  author    = {Charles W. Bachman and
               Manilal Daya},
  title     = {The Role Concept in Data Models},
  booktitle = {VLDB},
  year      = {1977},
  pages     = {464-476},
  crossref  = {DBLP:conf/vldb/77},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}

@proceedings{DBLP:conf/vldb/77,
  title     = {Proceedings of the Third International Conference on Very
               Large Data Bases, October 6-8, 1977, Tokyo, Japan},
  publisher = {IEEE Computer Society},
  year      = {1977},
  bibsource = {DBLP, http://dblp.uni-trier.de}
}