TY  - RPRT
TI  - Scattering-matrix description and near-field measurements of electroacoustic transducers 
AU  - Kerns, David Marlow
PY  - 1974
PB  - National Bureau of Standards
CY  - Gaithersburg, MD
SN  - NBS TN 651
DO  - 10.6028/NBS.TN.651
ER  -