HARMAN, D. K., Text REtrieval Conference (TREC)(4 ; Gaithersburg M. ; 1.-1.-0., National Institute of Standards and Technology (NIST), & Defense Advanced Research Projects Agency (DARPA). (1996, Januar 1). The Fourth Text REtrieval Conference (TREC-4), Gaithersburg, Maryland, November 1-3, 1995. (500236). Gaithersburg, MD: National Institute of Standards and Technology, 1996. Abgerufen von http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=483704

HARMAN, D. K, Text REtrieval Conference (TREC)(4 ; Gaithersburg MD, ; 1995-11-01), NATIONAL INSTITUTE OF STANDARDS AND TECHNOLOGY (NIST) und DEFENSE ADVANCED RESEARCH PROJECTS AGENCY (DARPA), 1996. The Fourth Text REtrieval Conference (TREC-4), Gaithersburg, Maryland, November 1-3, 1995. In: [online]. Gaithersburg, MD: National Institute of Standards and Technology, 1996. 1 Januar 1996. Available from: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=483704

HARMAN, D. K., Text REtrieval Conference (TREC)(4 ; Gaithersburg M. ; 1.-1.-0., National Institute of Standards and Technology (NIST), und Defense Advanced Research Projects Agency (DARPA). The Fourth Text REtrieval Conference (TREC-4), Gaithersburg, Maryland, November 1-3, 1995. Nr. 500236, Gaithersburg, MD: National Institute of Standards and Technology, 1996., 1996, http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=483704.

HARMAN, D.K., Text REtrieval Conference (TREC)(4 ; Gaithersburg M. ; 1.-1.-0., National Institute of Standards and Technology (NIST) und Defense Advanced Research Projects Agency (DARPA). (1996), „The Fourth Text REtrieval Conference (TREC-4), Gaithersburg, Maryland, November 1-3, 1995“, in , Bd. , Gaithersburg, MD: National Institute of Standards and Technology, 1996., verfügbar unter: http://pascal-francis.inist.fr/vibad ndex.php?action=search&terms=483704.