(Q71965365)
Statements
Surveillance for anencephaly and spina bifida and the impact of prenatal diagnosis--United States, 1985-1994 (English)
J D Cragan
H E Roberts
L D Edmonds
M J Khoury
R S Kirby
G M Shaw
E M Velie
R D Merz
M B Forrester
R A Williamson
D S Krishnamurti
R E Stevenson