1. Idiopathic congenital dilatation of the pulmonary artery;Kaplan;J. Lab. & Clin. Med.,1953
2. Discussion;Ehrenhaft,1955
3. Isolated congenital bicuspid pulmonary valve;Ford;Am. J. Med.,1956
4. Isolated pulmonic valvular regurgitation;Morton;Circulation,1956
5. Isolated congenital pulmonary incompetence;Segel;South African M. J.,1957