Information retrieval systems :
characteristics, testing, and evaluation /
F. Wilfrid Lancaster.
APA Citation
Lancaster, F. Wilfrid (Frederick Wilfrid). (1979). Information retrieval systems: characteristics, testing, and evaluation. 2d ed. New York: Wiley.
MLA Citation
Lancaster, F. Wilfrid (Frederick Wilfrid), 1933-2013. Information Retrieval Systems: Characteristics, Testing, And Evaluation. 2d ed. New York: Wiley, 1979.
Warning: These citations may not always be complete (especially for serials).