TY  - RPRT
TI  - Valve data collection: problems and pitfalls.
AU  - P J Drury
AU  - M M Black
AU  - C J Ashman
AU  - J Piercey
DO  - 10.3109/03091909209021950
UR  - https://pubmed.ncbi.nlm.nih.gov/1640447/
ID  - 1640447
ER  -