TY - RPRT TI - Summary report of NIST'S industry-government consortium research program on flowmeter installation effects : the 45 degree elbow AU - Mattingly, G E AU - Yeh, T T PY - 1994 PB - National Bureau of Standards CY - Gaithersburg, MD SN - NBS TN 1408 DO - 10.6028/NIST.TN.1408 ER -