00456nas a2200169   4500000000100000008004100001260004200042100001500084700001200099700001300111700001200124700001500136700001900151700001700170245008700187300001200274       2001                            d  bInstitute of AcousticsaSt Albans, UK1 aMDJ Tuffin1 aAI Best1 aJ.K. Dix1 aJ. Bull1 aG.J. Heald1 aH.D. Griffiths1 aG. Griffiths00aTemporal variability of P-wave attenuation due to gas bubbles in a marine sediment  a283-298