共 12 条
[2]
CAMPBELL S, 1971, J OBSTET GYN BR COMM, V78, P513
[6]
GAMPEL B, 1965, HUM BIOL, V37, P29
[7]
OAKLEY JR, 1976, 1976 NEON SOC M BIRM
[8]
OUNSTED M, 1971, 46 CLIN DEV MED
[10]
WAGNER M, 1967, BIOL NEONATORUM, V11, P106, DOI 10.1159/000240057