Textbooks: Feigenbaum's echocardiography and textbook of clinical echocardiography by catherine otto are a couple of the most commonly used references.
Answered 1/2/2014
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You bet!: Is the irs a reliable source of tax information? (hi, duck!) harvey and catharine have written the most widely used textbooks, but the ase (of which they are contributing members) writes the guidelines.
Answered 1/3/2014
4.6k views
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