TY  - BOOK
AU  - Willitts,John
TI  - Database design and contruction: an open learning course for students and information managers 
SN  - 1856040275
PY  - 1992///
CY  - Ottawa
PB  - Canadian Library Association
KW  - Database design
KW  - Database management systems
N1  - Bibliography : p.417-421
ER  -