TY  - JOUR
T1  - On Thermophones
JF  - Proceedings of the Royal Society of London. Series A, Containing Papers of a Mathematical and Physical Character (1905-1934)
VL  - 91
IS  - 628
SP  - 239
EP  - 241
PY  - 1915/04/01/
UR  - http://dx.doi.org/10.1098/rspa.1915.0015
M3  - doi:10.1098/rspa.1915.0015
AU  - de Lange, P.
ER  -