1993 An improved procedure for the determination of ground parameters using level difference measurements J Acoust. Soc. Am. 94(1) 396-399

1990 In situ measurements of soil physical properties by accoustical techniques Soil Science Society of America Journal 54(3) 658-672

19?? Probe microphone instrument for determining soil physical properties: Testing in model porous materials Unpublished? ?? ??

1995 The sound field within a rigid porous layer Applied Acoustics 45 283-296

19?? Grazing incidence propogation over a soft rough surface: laboratory and field experiments unpublished?? ?? ?? PACS numbers 43.20 Fn, 43.28 Fp, 43.30 Hw

19?? Acoustic characterisation of rigid frame air-filled porous media using both reflection and transmission measurements. unpublished?? ?? ?? PACS numbers: 43.20 Hq, 43.20 Fn, 43.28 Fp