TY  - RPRT
TI  - A simple device for fractionating density gradients.
AU  - K B Tan
PY  - 1972
DO  - 10.1016/0003-2697(72)90031-0
UR  - https://pubmed.ncbi.nlm.nih.gov/5009292/
ID  - 5009292
ER  -