TY  - BOOK
AU  - Lancaster, Frederick Wilfrid.
TI  - Information retrieval systems: : characterístics, testing and evaluation
T2  - Information Sciences series
U1  - 021.65 
PY  - 1968///
CY  - New York
PB  - Wiley
KW  - Sistemas de información
N1  - 28-76
ER  -