共 19 条
[1]
ALEXANDER GR, 1987, AM J PREV MED, V3, P243
[2]
*AM NURS ASS, 1987, ACC PREN CAR KEY PRE
[4]
*CA HLTH WELF AG O, 1986, LEG REP ALT BIRTH ME
[5]
*CHILDR RES I CA S, 1987, BACK BAS IMPR HLTH C
[7]
*HLTH TASK FORC FR, 1979, STAT PER SERV FRESN
[8]
*I MED, 1985, COMM PREV LOW BIRTHW
[9]
*INT FERT RES PROG, 1978, MAT REC
[10]
LEVY B, 1971, AM J OBSTET GYNECOL, V109, P311