Van der Kloot, W. Lawrence Bragg's role in the development of sound-ranging in World War I.. Notes Rec. R. Soc. Lond. 2005, 59 (3): 273–284. doi:10.1098/rsnr.2005.0095.
royalsoced.org.uk
Archived copy(PDF). [13 January 2016]. (原始内容(PDF)存档于24 January 2013).
web.archive.org
Archived copy(PDF). [13 January 2016]. (原始内容(PDF)存档于24 January 2013).