共 11 条
[1]
1972, N ENGL J MED, V286, P1363
[2]
1974, MATERNITY STUDY 1971
[3]
1973, INFANT DEATH ANALYSI
[4]
1976, IMPROVING OUTCOME PR
[5]
1970, NATIONAL STUDY MATER
[6]
1976, HEW24 US DEP MONTHL
[7]
1975, POPULATION INDEX
[8]
1961, ANNUAL REPORT VITAL
[9]
1955, ANNUAL VOLUMES VITAL
[10]
1976, REGIONALIZATION MATE