TY  - RPRT
TI  - Querying medical databases in an environment offering logical data independence.
AU  - P di Felice
PY  - 1989
DO  - 10.1016/0169-2607(89)90155-7
UR  - https://pubmed.ncbi.nlm.nih.gov/2702817/
ID  - 2702817
ER  -