Snider, A. Rebecca 
Echocardiography in pediatric heart disease /  A. Rebecca Snider, Gerald A. Serwer, Samuel B. Ritter ; with illustrations by Richard A. Gersony.   - 2nd ed.   - St. Louis :  Mosby,  c1997.   - x, 596 p. :  ill. (some col.) ;  29 cm.