Help! My daughter has a project on the invention of ultrasound-as in medical?

Anyone know any good webistes? There seems to be 10 different answers on who actually invented as far as for medical reasons?
Please help!

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One Response to “Help! My daughter has a project on the invention of ultrasound-as in medical?”
  1. Freebird says:

    Here's 1 of 10!

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