TY  - BOOK
AU  - Hartley,R.J.
TI  - Online searching: principles and practice 
SN  - 0408022906 
PY  - 1990///
CY  - London
PB  - Bowker-Saur
KW  - Database searching
KW  - Online bibliographic searching
N1  - 1992 reprinting
ER  -