[PHONOCARDIOGRAPHY OF PRACTICALLY NORMAL CHILDREN FROM 7 TO 12 YEARS OF AGE].
D035843:Biomedical Research; D002648:Child; D006801:Humans; D010701:Phonocardiography
CHILD; CLINICAL RESEARCH; PHONOCARDIOGRAPHY
FONOKARDIOGRAMMA PRAKTICHESKI ZDOROVYKH DETE I 7-12 LET.