TY  - RPRT
TI  - A simple bubble-flowmeter with quasicontinuous registration.
AU  - H Ludt
AU  - H D Herrmann
PY  - 1976
DO  - 10.1007/bf01851729
UR  - https://pubmed.ncbi.nlm.nih.gov/136034/
ID  - 136034
ER  -