TY  - RPRT
TI  - Tentative method for calculation of the sound field about a source over ground considering diffraction and scattering into shadow zones
AU  - Pridmore-Brown, David C
AU  - Ingard, Uno
PY  - 1956
UR  - https://ntrs.nasa.gov/citations/19930084502
ID  - 19930084502
ER  -