Patterns of high school students' explanations of their predictions and observations on sound по Soliven, Samuel R.

Sound advances as medical tool по Lane, Earl

Using sound по Morgan, Sally

Sound and vibration damping with polymers

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An improvised apparatus and suggested activities for teaching sound waves по Rodriguez, Socorro Magallanes 1949-

The meaning of sound по Ronan, Colin A.

Sound and ultrasound waves in air, water and solid bodies. (Zvukovye i ul'trazvukovye volny v vozdukhe, vode i tverdykh telakh) по Krasil'nikov, V. A.