TY  - BOOK
AU  - Houghton,B.(Bernard),1935-
AU  - Convey,John
TI  - On- line information retrieval systems: an introductory manual to principles and practice
SN  - 0208016600
PY  - 1977///
CY  - London
PB  - Clive Bingley
KW  - On
KW  - line bibliographic searching
ER  -