共 5 条
[1]
LANGMAN J, 1975, MEDICAL EMBRYOLOGY
[3]
REED MH, 1973, AM J ROENTGENOL, V118, P1
[4]
STEPHENS FD, 1966, AUST NZ J OBSTET GYN, V5, P64
[5]
WILLIAMS DI, 1976, J PEDIATR SURG, V11, P51