TY  - RPRT
TI  - A tri-modal directional transducer.
AU  - John L Butler
AU  - Alexander L Butler
AU  - Joseph A Rice
PY  - 2004
DO  - 10.1121/1.1639326
UR  - https://pubmed.ncbi.nlm.nih.gov/15000178/
ID  - 15000178
ER  -