Acoustic Material Tables - Extensive table of acoustic properties, expanded from the late Alan Selfridge's 1985 paper. - http://www.ondacorp.com/tecref_acoustictable.html
Velocity of sound in some Biological Material - Ultrasound physics. Parameters. Differences between X-rays and ultrasound.( Gonzalo Diaz M. M.D.) - http://www.drgdiaz.com/tables.shtml#Velocity