共 11 条
[1]
ARIAS F, 1982, OBSTET GYNECOL, V60, P277
[4]
CREASY RK, 1980, OBSTET GYNECOL, V55, P692
[5]
EASTMAN N J, 1947, Am Pract Dig Treat, V1, P343
[6]
GUYER B, 1982, NEW ENGL J MED, V306, P1230
[7]
HERRON MA, 1982, OBSTET GYNECOL, V59, P452
[8]
THE CHANGING PATTERN OF LOW-BIRTH-WEIGHT IN THE UNITED-STATES - 1970 TO 1980
[J].
JAMA-JOURNAL OF THE AMERICAN MEDICAL ASSOCIATION,
1984, 251 (15)
:1978-1982
[9]
LENIHAN JP, 1984, OBSTET GYNECOL, V63, P33