TY  - RPRT
TI  - Introduction to liquid flow metering and calibration of liquid flowmeters 
AU  - Olsen, Lief O
PY  - 1974
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 831
DO  - 10.6028/NBS.TN.831
ER  -