TY  - BOOK
AU  - Van Rijsbergen,C.J.
TI  - Information retrieval
SN  - 0408709294
AV  - Z699 .V35 1979
U1  - 029.7 
PY  - 1979///
CY  - London, Boston
PB  - Butterworths
KW  - Information storage and retrieval systems
KW  - Local
N1  - Includes index; Bibliography: p [192]-204
ER  -