TY  - BOOK
AU  - HARLEY,R.J.
TI  - Online searching: Principles and Practice
SN  - 0-408-02290-6
U1  - 025.524 
PY  - 1990///
CY  - London.
PB  - bowker Saur.
KW  - database structures
KW  - retrieval facilities
ER  -