TY  - RPRT
TI  - Density gradient system. II. A 50 channel programmable undulating diaphragm peristaltic pump.
AU  - R C Leif
PY  - 1968
DO  - 10.1016/0003-2697(68)90103-6
UR  - https://pubmed.ncbi.nlm.nih.gov/5704750/
ID  - 5704750
ER  -