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2. Incidence of congenital heart disease in Blackpool 1957-1971;Bound, J.P.; WF'E, Logan;Br Heart J,1977
3. The incidence of congenital heart disease in children born in Gothenburg 1941-1950;Calgren, L.E.;Br Heart J,1959
4. Incidence of congenital heart disease in children born to residents of Olmsted County, Minnesota;Feldt, R.H.; Avasthey, P.; Yoshimasu, F.; Kurland, L.T.; Titus, J.L.
5. Congenital heart disease in 56,109 births. Incidence and natural history;SC, S.Mitchell; SB, Korones; HW, Berendes;Circulation,1971