» Acoustic Material Tables    Extensive table of acoustic properties, expanded from the late Alan Selfridge's 1985 paper.    http://www.ondacorp.com/tecref_acoustictable.html

» Acoustic material property tables    Specialty Engineering Associates    http://www.ultrasonic.com/tables/index.htm

» Seawater Sound Speed Calculator    by Simon Richards.    http://freespace.virgin.net/sd.richards/speed.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