TY  - BOOK
AU  - Houghton, Bernard
AU  - Convey, John
TI  - On-line information retrieval systems: an introductory manual to principles and practice 
SN  - 0851572456
U1  - 010.78 
PY  - 1977///
CY  - London
PB  - Clive Bingley
KW  - Library Science
KW  - Information Retrieval
N1  - Includes bibliographical references and  index
ER  -