共 27 条
[1]
BERGNER L, 1970, Pediatrics, V46, P946
[2]
BLAND JM, 1990, APPL STAT-J ROY ST C, V39, P229
[5]
GRUENWALD P, 1969, PERINATAL PROBLEMS, P141
[6]
Hall M H, 1990, Paediatr Perinat Epidemiol, V4, P123, DOI 10.1111/j.1365-3016.1990.tb00625.x
[7]
THE EXTENT AND ANTECEDENTS OF UNCERTAIN GESTATION
[J].
BRITISH JOURNAL OF OBSTETRICS AND GYNAECOLOGY,
1985, 92 (05)
:445-451
[8]
GESTATIONAL INTERVAL FROM VITAL RECORDS
[J].
AMERICAN JOURNAL OF PUBLIC HEALTH AND THE NATIONS HEALTH,
1970, 60 (08)
:1496-&
[9]
HOFFMAN HJ, 1984, PERINATAL EPIDEMIOLO, P491
[10]
KARLBERG P, 1977, MONOGR PAEDIATR, V9, P86