TY  - RPRT
TI  - Retrieval from a large, integrated HIS-database through formal descriptions and SQL.
AU  - M P Hooymans
AU  - H Liefkes
AU  - J A Schipper
AU  - A R Bakker
PY  - 1995
UR  - https://pubmed.ncbi.nlm.nih.gov/8591236/
ID  - 8591236
ER  -